I have theSilk 850+1050Enduro: 900-1100-1300-1600Evo1650+Pure1100. weight 97on a good day, often a bit more.Parawing: no clue. I have the 4.2 Flow bit hardly use it because when its good I wanna wing.For me with my DW board and Midlength (KT SuperK92) the Silk1050 needs a bit more wind as the Enduro1100 and fair bit more then the 1300, but the differences arent shocking. With the Enduro,s the stallspeed is lower and they offer more glide.Mast positioning: 2cm (No clue what that is in inches/foot etc) further back as with the Silk.
Regarding to bumps/waves: Supfoiling I can ride the 1300 in proper Ocean waves over 2m, From 1.5m and up the Pure1100 and Enduro 1100 are easier to control/tighter to turn. I havent yet paddled the conditions where I prevered the Silk due the lesser glide/lack of skills to stay close nough to the pocket to bennefit of it supfoiling.
Other way around: The 1100 and 1050 have a similar take off speed while the Enduro1100 has more glide. I,m too heavy/not skilled enough to get that one going in waves below shoulder high.Do I need the 1100 Enduro? No! With the Silk1050 and the Enduro1300 99% of my usage is covered and there is only a very little gap inbetween......but whats fun in having less foils and less variety?

Do I need the 1300?: I think for supfoil its essential to me, for wingfoiling it is sometimes fun in very low wind, but only ads a little to the Silk1050 in getting going (althougfh it glides longer).