Great choice Mark. I found several entries with different apertures in my log. I try to translate the most important.

4", 65x, NELM 6m5+
striking bright, 2:3 elongated, stars in the direct neighborhood

16", 257x, NELM 6m5+
bright and large, somewhat twisted central region, main spiral stared NW and runs towards SE, within spiral two spots (IC 3551 + [HK83] 40) visible, faint arc to the SE end, runs out faint to the NW with another peak at the NE edge (IC 3555), IC 3563 detached to the SE
follow-up observation: another laminar peak without IC designation between IC 3555 and IC 3551 visible (IC 3551 smaller but brighter), IC 3551 visible as a small and very faint peak
NGC4559.jpg

20", 200x, NELM 6m0+
quick and dirty observation, bright bee NW-SE elongated, subtle spiral structure and HII region, IC 3563 + IC 3550 + IC 3555 visible, IC 3551 + IC 3552 not seen