I have cobbled together this:

• Shimano Deore 11-51T cassette
• Shimano GRX812 rear derailleur with a Shimano XT cage (search online, it's a known hack)
• Wolftooth Roadlink
• Shimano GRX 600 crank with Specialites TA GRX chainrings (44/28T)
• long chain
• oversized pulleys (which may or may not be helping, 12T & 15T)

For the pulleys, I actually had to file down part of one of the XT cage plates to make them fit. The whole system runs fine and handles both the big-ring/big-cog and small-ring/small-cog combinations. There is a bit of chain rubbing on the front derailleur in the hardest gear of the big-big combination, and the second-to-last hard gear with the small ring also rubs a bit. The hardest gear, however, runs fine with a slightly loose chain, so I wonder if a bigger pulley would help.

I am considering buying one for my Ultegra groupset. Which one should I aim for? This one? Or the spider? I am a bit confused by Magene's webpage.
Where would be the best place to order it? Directly or from Magene?
Thanks!

Are there any references/reviews on this? I have yet to buy any of the carbon handlebars from ali. Also I a bit worried about the whole cable-routing in tight spaces - the road bike is fully mechanical.

I've bought two H303. First one worked fine, but got lost in a hotel. Second one started burning through batteries in days after a month or so of usage (typically a CR2032 kept me going on Wahoo or Garmin for 4months). As replacement bough a Coospo from amazon. Now testing XOSS rechargeable one.

Best value ever for lights
+ dual color (red/white) lights, incredibly cheap, versatile, tough, easily replaceable when "long-term borrowed"
- micro usb, the bracket favors broader seatposts
https://www.aliexpress.com/item/1005005983330158.html

Favorite front light (Towild BR800)
+ replaceable battery (18650), acts as a charger too, usb-c, garmin mount(s), endurance, much cheaper then big brand names (with coupons and on sale even better)
- does not have the remote control gimmick as the newer model(s) & I paid full price
https://www.aliexpress.com/item/1005002749393930.html

Ok-ish light
+ dual color, light, usb-c, reasonably priced
- plastic feels cheap, bracket is flimsy at best (due to that I lost them on a pretty flat course with few potholes)
https://www.aliexpress.com/item/1005006869585772.html

Good light
+ endurance, coverage, great for early winter commuting, now serves as a MTB light
- a bit unwieldy battery, own charger brick
https://www.aliexpress.com/item/33006251616.html

All the lights I bough were levels above the performance and endurance of branded ones (Lezyne, which I now consider expensive trash), not to mention that the price and consistency in quality.


Great food pouch
+ cheap, not frivolous, no logo or branding
- nitpicking: does not have a clever system of two cords (one to open and one to close the lid)
https://www.aliexpress.com/item/1005006184350073.html

Good bibs
+ good price, cargo pockets, good cushion
- not yet long term experience
https://www.aliexpress.com/item/1005006594256524.html

Ok-ish socks
+ ok price, slick color
- nothing special(dhbs are more comfortable), bit small in the largest version
https://www.aliexpress.com/item/1005006732135832.html

Helpful bottle cage adapter
+ just works
- bit heavy
https://www.aliexpress.com/item/1005005639423614.html

Useful bell
+ small but noisy, can be placed on/in the hoods
- has to be torqued from time to time
https://www.aliexpress.com/item/1005002233002450.html

Ridenow TPU tubes
+ packaged size, weight
- color
https://www.aliexpress.com/item/1005004973646613.html

Decent handlebar bag
+ sturdy, survived 1200+km tour holding wet tent and sometimes saving the content from the rain, reasonable price
- bit flimsy to set up (has a tendency to lean on the side with more weight on)
https://www.aliexpress.com/item/1005006588644382.html

Bike carry case
+ reasonable price, fits larger frames without the need to remove the rear wheel
- does not cover the bottom, therefore the shoulder strap has to be connected to the top tube making the whole setup unwieldy
https://www.aliexpress.com/item/1005005037865454.html

Decent Garmin/GoPro mount
+ cheap, aluminum
- strange L form instead of a streamlined direct I form (there are those variants for 3-4x, had noticed them too late), bolts provided are not stainless
https://www.aliexpress.com/item/1005006501431003.html