IF it helps though its page 2

I find checking the springs themselves is an idea as they are sometimes worn or worn on one side and not giving the same strength. Its not special and can slacken over time.
Next up would be to check how your cable 'flows' and that theres plenty to allow for a gentle sweep and no tight arcs.Not too much though as the outer can flex and rob you of a bit of pull. A coated cable and plenty of slippy grease like bearing grease will help cut down on friction and help the canti springs to easily return.
With cantis it all seems to be down to consistency throughout the system.
Personally i hate the blooming things and was on hope discs within 2 years of them coming out
Rear mech- Could try releasing the cable completely but leaving it in the clamp for a quick easy tighten. Then set the limit screw to drop the mech down(make sure no years of grime build up in tight corners arent impeding it any) Cable adjust screw on the back of the mech right in and tighten the cable without putting any strain on it. Then do up the cable adjuster on the mech till its taught.
Bike on the stand and run through the gears quick as you can. Bit of gt85 into the pivots could help.
Unlikely and hands up for idiocy if im totally off the scale here but what size BB axle is it ?
Maybe best ignore that :? but ill leave it up for a little light hearted derision and pouring on of scorn.
Front mech
Alpine ? Compact ?
Im using a modern Sram X9 front mech which was never designed for anything over i think 42t :? but im running a 46t outer and 38t middle. The mech barely makes the change and i lose the bottom cog on the big ring. It works, but a small ring is a no no as it cant accommodate all three.
Best not to ask me why
