Thanks a lot for the feedback. I just had a panic that the NOS cranks I ordered (Rotor Flow) wouldn't fit, but Google seems to think otherwise. Apparently they have a 'UBB30' axle that works with everything: https://www.mantel.com/lu/rotor-inpower-flow-mas-power-meter
Seems wise to get something second hand off eBay until I know what works - there's a set of the Vuka Alumina base bars/extensions on there at the moment I will go for.
Thanks a lot for the feedback. I just had a panic that the NOS cranks I ordered (Rotor Flow) wouldn't fit, but Google seems to think otherwise. Apparently they have a 'UBB30' axle that works with everything: https://www.mantel.com/lu/rotor-inpower-flow-mas-power-meter
Seems this is the go-to BB? https://rotorbike.com/catalog/default/rotor/triathlon/bottom-brackets/bbright/press-fit-4630.html
Seems wise to get something second hand off eBay until I know what works - there's a set of the Vuka Alumina base bars/extensions on there at the moment I will go for.
Will keep an eye on on ebay for a seatpost...