Happy for any advice from any side
1. The tilt function intermittently vibrates/pulses that bad you would genuinely think it had the pulse feature.
2. When you use tilt/rotate at the same time tilt acts like it’s getting to much oil making it go like f**k in both directions.
3. Unit was set up remotely so needs dialled in on the field to smooth it out, perhaps then these issues would be resolved ?
Ok, sounds like it is not set up right at all (obviously

)
First things I'd check starting out fresh on this one would be the simple things, such as is it plumbed up correctly? Is Pressure and return going to the correct ports, I'm pretty sure the Volvo is feed differently to most machines, I.E looking out the cab the left hand side of the dipper has return rather than feed!
Most tiltys have built in check vales meaning that they can't be feed from the wrong side, but some smaller ones don't... and can cause them to operate but cause strange problems....no idea about yours.
Next thing would be pressure and flow? the flow on most smaller machines is fixed, (can't be selected like larger machines) so you could presume this to be right. So i'd like to know the pressure is set to the engcons spec!
The vibration in your tilt could be caused by low pressure, having just enough to open the check valve but then it drops slightly and the vibration could be from the check valve opening and closing rapidly. if this makes sense.
And it could just be a case of needing fine tuned! I have talked a few people through calibrations over the phone ( Rototilt ICS doesn't have remote access, something i have asked for!) But there is No comparison to sitting in the cab and seeing how the machine reacts to each adjustment.
If I'm correct you said that yours has been changed from SVAB to DC2, was the feeder valve changed also? shouldn't really be any different, but if it was it would cause problems also.
So like I say, starting off I'd be double checking flow and return and pressure first off. Hope its been some help, don't be afraid to ask any questions if I can be of any help.... although I know nothing about this control system il be happy to help.
Also keen to hear what it was when you do get it sorted.
Aiden