CEEGEE, get some dubro pinned hinges and like everyone said just cut on hinge line and use a h-knife and cut thim out by running it along side the hinges and pull them out.

just got back in from flying and man, this thing knife spins great, getting better all the time, did learn a new way to enter and it might work for you guys trying with no luck, just enter stall nose up and give full dn ele(no rud yet and give it some gas(just like a water fall) then as it goes into a spin start in left aileron and it starts to go over to knife spin then add a little and i mean a little left rud and thin start doing your own small adjustments from there and i think youl all be suprised how goood t does them, i cant remember all my throws but if needed i will go dig them out, i do know you will need a lot of ele, alot of ail and some rud with around 65% flaperons, now go do it guys[8D] oh and my cg is at 5 5/8