Just a thought, if you haven't already done the changes, when you have the the clutch and compensator of you may have a good look at the positioning of the main shaft bearing race. The race determines the positioning of the clutch hub and carrier. If the race is positioned ( to far out on the shaft ) it will interfere with the clutch engagement on hydraulic clutches. Cable clutch control can be overcome by adjustment, but not hydraulic, The race should be in the area of 2.5mm or I think that's 1.25 in ( but best check that out at your end) from the inside of the race to the outside of the drive belt pulley. Only thing is you need to pull the inner primary case to check the setting of the race but if you're having issues it could be worth the check as it being a factor on the clutch positioning.
I think the race is something that gets overlooked when it comes to clutch fault issues ( other than a worn out clutch)
I found on mine the race was installed to far in on the shaft from factory( no clearance between the race and the belt pulley) which caused bearing and clutch hub spline failure.
Just a thought, hope you get it sorted.