Don't you just hate black soldermask :|

If you remove three of the capacitors that are in parallel, then put them back in the other way round, you will have one terminal of all 6 connected, so just one piece of wire will be needed to connect the '+VCC' and '-VCC' terminals to have the capacitors in parallel. If you can break one track on the PCB and add one piece of wire, then you can use the existing diodes.

Quote Originally Posted by routercnc View Post
More capacitors will be better with lower ripple but I guess gives more in-rush current so more chance of tripping the MCB on start up. At least I can play around with the number of capacitors if I have that problem. But if it just works then I'll leave it and get on with using the machine.
Yes, we'll see - you will have a lot of capacitance. I looked at that situation recently with my motor drive - that's got 660uF @ ~340V and with direct connection to the mains the scope showed that the current peaks at about 15-30A depending on the timing. That still doesn't blow a 6.3A slow blow fuse though, as the duration is only a few milliseconds.