Update:


Just finished working on doing the mods to my DIY Function Generator and everything appears to be working as I wanted them to, all three waveforms are now adjustable in output level, I may at some later-stage pad-down the square wave output a bit so it is roughly equal to the sine and triangle outputs, but for the time-being I'm happy with it, so I can get-on with doing a full write-up so that those of you who are interested can build one for yourselves.