Winston O'Boogie said:P.S. This is right up PRR's alley, he can do this stuff while also filling out everyone else's tax returns.
I'm less of a "doing all the maths beforehand" guy as that stuff was never my strong suit.
I'm quicker just lashing it up and adjusting stuff until it fits.
If I get stuck then that's when I take a time out and do all the sums.
There are other dudes on here who excel at that stuff though so, hopefully someone comes along to offer a hand.
I usually have to resort to strapping everything together then figure why it didn't work as I don't have a reference of the various formulas needed and when they are applicable.
I think the best solution to move forward with getting an actual board laid out is to leave a spot for a resistor or an off board inductor as those would be sizable enough to make sense to keep it off the PCB. This is ultimately a DIY project so there will be room for additions and substitutes per the builder's taste and imagination.
Also, following further review I think it would be better to keep these as single channel boards with an off board PSU. This will make this circuit accessible to more people who may only want a single channel.
I still have some reading to do regardless...