Should i get a smaller model?

Hello,

At first let me tell my Super-O story: The first prostate toy i had was a aneros knock-off (the nexus excell), At first i didnt got any pleasure from it so i didnt tried in a few month. Then a few months later ive thought: "Maybe i should try it again." and i got great p-waves from it. After few pleasurable times with the nexus i wanted to go the official way and bought me an "aneros progasm ice", but after several tries i dont get any pleasure from it and no involuntarys. I dont have any problems with insert it, but i guess its just too big for me, because i cant feel it moving inside me. Do you think i should get a smaller model, and what is the best model for me (i would say, i´m a beginner)? Would be the helix (Syn?) a good choice?

Thanks in advance.