VCO tuning and scaling issues

I tried playing my 400 VCO from Elektron A4 and noticed that the scaling is way off, can barely get 1 octave in tune on any of the VCOs.

Has anyone had any luck getting theirs to play in tune? I allowed it to warm up for 30 minutes after the first unsuccessful attempt, and obviously I was using a correctly rated power supply.

I know the VCO’s have trimmers on them but I’m reluctant to take it all apart if they are not going to solve the issue, also they are very small smt trimmers so pretty difficult to adjust.