Yeah, it turned out that old San Marco I had in the garage was a piece of cake, can get the bolts with a simple 10mm wrench from the side, unlike the saddle that was on it which was a finger wrenching nightmare and only accessible from behind.
I'll replace that at some point soonish but looking at the fizik on my other bike scares me, don't think that would be an easy switch, I know have another criteria to factor into saddle selection.

The good news is I think I've got it dialed in enough for a quick 8-10 mile ride before I start drinking beer