Stuart, those motors are still a little on the small side for me at 1.4 Nm. The nema 23's I've got & will get round to fitting at some point are 3.1Nm. Original motors are 150oz which is just over 1Nm.
The chinese spindle I bought is mounted with one of those bearing housings, I asked on here about spindle mounts because I couldn't find a UK supplier & one of the replies was to use the housing. Haven't been able to cut anything yet but the spindle seems nice & secure. Just had to push the bearing out & cut a slot in the housing. I removed the original porter cable mount & fitted an aluminium plate in it's place & the bearing housing/mount is fitted to that.
Pretty lucky because all the bellows seem to be in good condition. Judging from the general condition of the machine I don't think it has had a really hard life, supported rails are in good condition but if I were to replace them at some point I would probably look at fitting something a bit bigger like maybe a 20mm rail.
Vacuum table might come further down the line but it would need to be fairly thin as there isn't a great deal of Z axis travel from what I can see.
For now to get me started I will just use the "T" slot clamps & see how I get on. Need to replace the acrylic strips on the bed as they are quite thin in places & as I want to resurface it to make sure it is flat I would probably be down to the aluminium in places lol.
I've got the original dust extraction fitting but not sure how good it will be, there was also a mist system for cutting but haven;t tried that yet either & not sure if I will be trying to re fit it or not at the moment.