Has any one got or used slingshot converter, I have had for couple months but keep moving mast around and foot straps trying to get the best combo. In lighter winds I find the board riding higher in the front than normal and feels weird. Still up and going for over an hour doing all transitions just seeing if some one else has any better set up that can stop me wasting time. added couple of photos of the set up I find going ok, but like I said im new at this and open for suggestions " constructive ones please "

Have you tried foiling without the rear strap? it will give you the freedom to fine tune your stance using your back foot for adjustment. Definitely worth a try.

Yes I would agree with DukeSilver...
It seems the rear strap is in what is normally the optimal spot however having the rear strap about 200mm further back will allow you to still have your rear foot in that position out of/in front of the strap. You can then use the rear strap for harder edging, carving, boosting and backrolls.