One of those Pin Presses are ideal, I must get around to making one !
do you reckon can can make a version that could be used to extract and insert the roll pins in the remote housing, the one in the gearbox selector shaft as well as the ones off he back of the diff housing
I haven't actually thought about those. I did make my own 'punch' a while back for doing those in the Shifter Housing, though, I use that one in the Press, but can be Hammered too. I made it such with a long thin 'pin' in it, that goes a long way in to the Roll Pin so when using it, it helps control the shaft from rolling, which I found happened often when trying to get the pin started for removal. Now I can drop the 'Punch' in to the Pin and that holds it where it needs to be, leaving me one hand free to simply line up the head of the Punch under the Press.
I can't say I've ever had issues removing that on the shift shaft in the Gearbox, they seem to come out with a Punch and not having to resort to bashing it hard at all. I can't see why a Pin Press couldn't be made all the same.
Likewise, that for the Diff Centre Pin, being an all steel part that can be sat flat on the bench, over a small hole, is fine for removal I think. Similar for fitting it again too, only it needs to be stood up on the Bearing mount. The worst part of removing these pins in some instances is the full diameter of the hole for the pin is never drilled right though, it's only a smaller hole and often cocked off at an angle. Usually, when I have these apart, I'll drill that hole though using an end mill cutter. As I no longer run these Diffs, it's not often I encounter them anymore.