Very nice Paddy. A great selection of multiple galaxy systems, most of those objects are now on my list
Nice job seeing ESO269-82, NED gives a B Mag of 15.1, and looking at the DSS image that surface brightness looks real bad!
Incidentally I also observed Abell 1631 on the same night. Clearly, great minds think alike
About 10' SW of NGC 4756 is IC829 and another 2' W is MCG-02-33-36 which is a double system, which I couldn't split. Didn't play with the magnification 'coz of crap seeing. Also caught MCG-02-33-033 which is 10' NW of IC829 and the most difficult object was 2MASXJ12531842-1532038 which is about 12' SE of NGC 4756.
That's 5 members of this cluster in the bag and the limit from my place...... but with your 16 inches and dark skies, the tiny clump (PGC 434730/43736 are the two "brightest") lcoated 4' N of NGC 4756 is within reason. NED gives a much greater redshift for these galaxies, 0.0446 vs 0.0136 for NGC 4756, so it appears we have two clusters along the same line of sight.
cheers