Don't overthink this. A pier or tripod is simply something to hold your mount above the ground. So, you can attach any mount to any pier or tripod with the right adapter plate. I've never owned a Celestron 8SE, but it sure looks like the mount attaches to the tripod with the single bolt which tightens the spreader/ eye piece holder plate against the tripod legs. There are a couple of ways to attach that to a pier:
- If the pier has a hole in it you could thread a bolt through the top of the pier into the bottom of the mount using that hole for access
- You could also make a dual plate adapter: one plate bolts to the bottom of your mount and also has three or four holes in it for bolts to attach that plate to the pier. Then the pier top plate has matching bolt holes in it so when you place your mount (with its plate) on top you can use bolts to attach the two plates (like the second photo in thesungazer's link to SkyShed).
As for a removable pier for your new slab, the problem may be making the connection between the bottom of the pier and the concrete slab: if you use traditional anchor bolts they'll stick up when the pier isn't there and make a tripping hazard, if you use threaded inserts they'll fill with grit when the pier isn't there and make it hard to bolt your pier down when you want to observe (and/ or be a maintenance hassle).
One option is to get a portable pier and set it on your new slab when you want to observe. But if you're happy with your current tripod this would just be an added expense.
Another option I decided on... For observing at home, I set up in my driveway. One night I set up my mount and scope and did a decent drift alignment. Once that was done I marked the locations of the tripod tips on my driveway. The next day I used a masonry bit in my drill and made three dimples (3/8" diameter x 1/4"(?) deep) for the tripod tips to sit in. I also marked my mount by using a utility knife to score witness marks on the RA axis, declination axis and on my scope's dovetail to make the previous night's set-up repeatable. Now all I have to do is set my tripod down, mount my scope and I'm ready to observe and polar aligned in a couple of minutes.
Edited by macdonjh, 11 September 2019 - 10:30 AM.