Hi all,

I have a Slingshot DwarfCraft 100cm board + 657 Phantasm foil (102cm carbon mast) and I can kite foil reasonably well. Naturally, I'm going to start wing-foiling this summer on different gear.

But in the meantime, I'm wondering what else I can use this set up for? Can I buy a new front wing and try dockstarts, or prone surfing?

Add a Foildrive and your sweet, kitefoil boards work really well.

Ok cool. For surfing then, would I need a bigger front wing? for more lift?

I run the PNG1300, but I'm pumping. If you're in the surf a PNG1010 is good and as you get better a smaller HA wing, some are even riding the ART range. Here is what is possible

As Airsail said,
Adding a foil drive is an awesome addition, the slingshot foil range is extensive. Look at the G1000 foil for prone foil.
The 100 DC kite board is awesome I ran one for two seasons. It would make a good dock start board but the mast would be to long. You want the wing closer to the surface.
The front foil you have is an awesome wing for lite foil, if you have that dialed you can ride anything.
Grant