It's been a busy weekend, I've done the schematic except for the capacitors and connectors. (I was waiting to see what size parts you wanted). I assume that everything on your board is the size that you intend to use. I'll see what I can fit into 2 inches by 5-1/2. (Actually my max length will be 100mm because I'm using the noncommercial Eagle.) So I will try for single sided 2" x 4" maximum.
Starting to label parts, choose sizes, and work with your layout, I'm having big problems.
Board has rearranged numbers for Q1, 2, 3, 4 making it totally confusing. Add to that, all of the pins on your TIP32s are swapped (EBC should be BCE). Collector is always center on TO-220 package BJT's! There are two Q1's, two Q3's, two R12's
I'll give it more time when you've added those new features you mentioned and cleaned up the schematic a bit.