Last month my 60l Appleslice V2 arrived. I,m 94kg right now, (I was 102kg when ordering in may) and its my first true sinkerboard.Construction and finish is top notch. Its hard to catch in a picture how well its made and the way the epoxi swirl colours are IRL
4.9x22.5x60l
weight: 4.9kg My other board is an AK5.8x90l1st "session" I went out in a waisthigh chop and gusty wind...and couldnt even get on my knees on the board

It flipped under me away in every possible direction2th sess I went to a lake on a windy day. grabbed my 5 where I would ussually go for a 4m and after a bit struggling to find the balancepoint I was flying.One in the air it was easy and except slightly lighter and more reactive it felt quite normal. Played a lot that day and did dozens of re starts to get that in my system. 3th +4th sess: plenty of wind at sea and in the waves. again, rigging a 5 where I would normally grab a 4 but with that in mind I,m getting into it. pumping is easier, surfs nice and turns tighter as the "big" 5.8 AK. Feeling in control and quite comfortable re-starting....till 2 weeks ago: While entering the water a wave caught me and slid the foil tip through my 5m.It was plenty of windy and I was already in doubt between 4 and 5 so grabbed my 4 and had heaps of fun for 45min...then the wind dropped like 3-5knots and no matter what I couldn't get from my knees to standing up without the extra grunt. After a lot of swearing and numerous attempts, i swam/dragged back for 1.5km to the beach.
Swapped to my big board and had a lovely session.
So when its really windy its good fun, when not, its at least for now really really difficult, but i guess that is part of the learning process instead of something to blame the board for.
ooh box position is quite a topic:
I use an Cedrus mast and with my Kujira 1210 the foil is pretty far to the back.With my Cabrinha H1200 and H1000 its a couple of CM of the front, but with enough space to play with.