I have twice used the Bogen 3221 for a compact SV225 setup. However, I do think that this substantial AltAz mount can reach its full potential on a slightly heavier tripod. These setups are for grandchildren who will not soon exceed an 80mm short tube refractor. Features like...
That SV225 mount will definitely manage you new 102mm Mak. I have one on a smaller capacity Sky-Watcher AZ Pronto Alt-Az mount and it does fine: The Sky-Watcher Star Adventure tripod in the photo uses the standard 3/8"-16 bolt to attach the mount head to the tripod, s...
but the SV503 has something the AT102ED does not: the entire focuser--not just the diagonal/camera end--can be completely rotated through 360°. I had one last Summer. Here's the CN Ad with a description: