FYI, on SM2K the linear drive is M81134 "long."
In general terms, stronger is better. Space availability could be a constraining factor in your case.
In my opinion, the rotary installed on Peregrinus is not strong enough, so when the going gets rough, we switch to the linear, but it would be interesting to hear other's experiences.
Cheerio,
Peregrinus
SM2K Nr. 350 (2002)
En route, Leros to Agathonisi
