Hi Wyndham

I am not an expert on routers.

Belt drive is okay so long as the belt is spring tensioned and has a big driving pulley to get lots of teeth engaged.

A vacuum table isn't exactly hard to make if you have enough clearance in the Z. OTOH you could hold the workpiece down by hand as it comes to cuts end.

Pukka dust extractors are inexpensive and hold a lot more than Henry, or was Henry for the hold down?

A sacrificial sheet of MDF below is kind of vital, much easier to cut through than cut perfect.

Have you considered making your own router? It's more Meccano than rocket science these days, you just have to decide on your trade off between speed and precision. Screws give more precision but require servo motors if you want speed in the traverse. Long screws can be whippy. Linear profile rails and aluminium extrusions make router building a doddle. If you are tooled up to cut quality grade plywood so much the better.

Good luck

Robin