Hi! I'm still planning, too and gonna start building the next weeks, at least I hope so.
For now, I 'll set the CP at 1020 mm (40,16") height - when sitting on a bar stool I need about 900 mm (a bit less then 36") to put my knees comfortable under the CP, and to have enough space for the controls, I add 100 mm plus 20 cm thick wood.
I wouldn't angle the CP too much - as stated on a website I don't remember exactly it can 'cause "a pain in the wrist" if you angle it to strong. Just an easy test - grab an imaginery joystick at 0 degrees and the same at 20 degrees - which one feels better?
Maybe I'll go with 3 to 5 degress, just to give it a better look, but with unlimited quarters at home I'd like it to be ergonomical.
Oh, and it's even more than 2" under my belly button!
