I'm not very familiar with the workings of this type of bow but couldn't you pike(cut off) the tips and gain a few more pounds? With that much rigid limb tip you should be able to remove an inch or two from each tip to gain some extra draw weight. It will stress your working portion a bit more but if well tillered that shouldn't matter too much.
I find this style very interesting. It reminds me of a Turkish bow with a flat profile. I can see all sorts of possibilities for useful bastrardization with this design. 
You've done a fine job on this bow Frode. Well done! 
Thank you very much, Pat!
I've never tried piking before, but I did start the levers long with the intent of tinkering, so I think I'll soon find out
! And I agree, the possibilities are intriguing!
Frode
