Thanks Jeremy, we shall see soon I guess. I bought a planer/thicknesser only recently its been a revelation, though I never go for fancy combinations. The core of this one is a parallel 9mm, I make the core as big as possible allowing for thin tips.
adb - I do think maple with handle the tension fine, I have used if before on bows up to 110lb and the quality I used wasnt that good. With good grained 1/4 sawn wood or again single growth ring it will have no trouble. Something I tend to do on a back, and I don't know if you do too, is take the edge off at an angle where you can just see the core wood on the edges; I will see if I can get a picture. Like the typical MR shape it puts more pressure on the back and generally makes a quicker/safer bow.