I got Lewis a set of 24 inch wheels built up using alex ace 20 rims and SS switch hubs. come in at 1705g (F800g, R905g) using DT DB & sapim race DB spokes and brass nipples. I set them up tubeless with superstar tape and valves (gorilla tape and DT valves are better) with Rocket Ron tyres although I had to use a ghetto inflator to get them to seal.
Can see some pictures here
could shave off 190g using crest rims (£136) and 158g using Circus Monkey HDW3 hubs (£110). The total cost for the SS/alex wheels was £150 incl build. I saved 505g on the wheels not including going tubeless