As per above post I managed to source the correct BB and now have completely built up my TT017 and given a few good test rides. Specs are as follows:
• Size large TT017
• Groupset: Ltwoo ERX TT
• Brake calipers: Wheeltop (supplied Ltwoo were problematic – see below)
• Rotors: dura ace (160/140mm F/R)
• Saddle: Adamo copy
• Chain: 12 speed dura ace (waxed)
• Cassette: Sunshine 12 speed 11-34
• Front chainring: 56t narrow wide
• Power meter: Xcadey
• Pedals: dura ace SPD-SL
• Cranks: Rocks bros DUB 165mm
• BB: Senicx T47 DUB ceramic external bearings
• Rear wheel: Elite Velo disc (TPU tube)
• Front wheel: Cannondale Hollowgram Knot 64 (tubeless)
• Tires: Continental GP5000 S-TR (25/30c F/R).
• Weight: 9.3kg.
Observations/notes
• Fittings like bottle cage bolt and front mech hanger are branded Quickpro. Am guessing ICAN manufacture the TT One for Quickpro using a higher modulus carbon.
• Since it came from the same factory, I purchased Quickpro decals just so I can flex on this bike with my friends. Much like Cannondale hi-mod frames, in my mind this is just a lower modulus TT One.
• Paint quality was great, can’t see any imperfections with my eyes.
• Ltwoo battery could not fit in seatpost or downtube, so I wrapped it in thin foam and wedged it down seat tube – it doesn’t rattle but will be fun to get out.
• Cutting steerer tube to correct length was tricky. I erred on the side of caution and ended up cutting it one or two milometers too long (only realised after routing cables through). As a result it now pushes the plastic cover up so that its not flush with top tube (not a big deal). Think someone else in thread also mentioned this but would advise anyone ordering this frame to ask ICAN to cut it to correct length.
• BB installation was problematic. I have a T47 16 notch 52mm tool however with the external bearings it was too shallow to fit over the bearings and reach the BB notches. Had to take to LBS who charged me $AUD65 for a 5 minutes job

. Have now ordered correct tool off aliexpress for like $10.
• It is heavy at 9.3kg but am not planning to do any hilly TTs. If I take out disc rear (that weighs 1200 grams) and use spoked carbon rear wheel I can get weight down significantly.
• First time using Ltwoo electronic and am quite impressed. Bit of a learning curve to set up but the app (and shift indexing) is way easier to use than Wheeltop. I have noted elsewhere on Chinertown water ingress issues so I will put heat shrink over rear mech connector. Shifting speed is great, probably not as fast or accurate as 12 speed Di2, maybe down the line I will put a Ultegra 11-34 cassette on it and that will make shifting even better.
• Ltwoo brake caliper with 160mm adaptor would not fit in front fork recessed brake mount. Replaced with spare wheeltop caliper.
• Rear Ltwoo brake caliper had a sticky piston out of the box. First thought it was uneven brake mounting surface, but just replaced with the other spare wheeltop caliper. No brake rub at all now.
• Bleeding brakes is really easy on TT brake levers without having to stretch rubber hoods out of the way.
• Since I’m not running front mech, to charge the battery I will have to unplug rear mech, plug in front mech and then plug that into USB-C charger. No big deal.
• Haven’t added up total cost, but without wheels/tires/rotors am guessing this cost me less than $AUD4000, which is a bargain considering a Giant TT frameset alone is around $6000.
• Will add a front chainring guide soon for peace of mind.
I’ve done three decent rides on it and am slowly dialling in my fit. I sit in UCI height category 2 (180-189cm) so have set up extension reach to comply. Am now looking at the Winow ARB02 extensions (which I’ve been told by Winow will fit to the existing adaptor plate). Am still figuring out which size to order so that they don’t exceed my category limit (830mm from centre of BB to tip of extension). If anyone has any experience with this and knows what size ARB02 I should get please let me know.
Note picture shows 140mm SRAM rotors F/R before I changed to DA, chain has been cut (was initially too long), and front mech cable sticking out has been removed.