i used many of them, R310SL 28h for gravel set, R180 for some road.
R240SL and R180SL just lately, but most of them is on that model that doesn't have model number, no logo, just ratchet 24h and weight around 290 grams. They are just normal ratchet and not to loud, best choice for most wheelsets.
So you used R180SL for a new set of MTB wheels, do you know what was the weight you got?
As far as I could see the M180 weights around 350 grams,
https://es.aliexpress.com/item/1005006065318449.html and can´t see any difference from R180 version who weights the same
https://es.aliexpress.com/item/1005006057668006.html.
I was just planning to use this Goldix 240EXP, 309 grams,
https://es.aliexpress.com/item/1005003014289678.html.
I did some builds with GDR310 and they were reliable and if not, you could get the ratchets from DT Swiss 350, compatible with them.
What would be your recommendation to build a new XC Wheelset?