Just driving back from the Vaikobi Down wind race in Sydney. Absolutely terrible conditions but I couldn't believe what I witnessed in basically no wind or swell the Sup foil DW girls did the whole race without coming down . One of the stand out foils was the new Code 1250r
codefoils.com/product/r-series-front-wing/I watched these guys paddle up in 3 strokes and pump without using their paddle against the wind and swell apx 1km from the bay to around the headland and foil back it was insane the watch , the foil is so efficient it looks like a foil drive

I'm sure you son could pump this forever it's just so fast on the pump and it looks effortless . Definitely worth a look .Code also has a new pump foil range coming out for the dock starting crew released mid year .