p38's suck! they hurt my fingers to use and I always slip and have a terrible time with them! Himself of course is a past master at using them but then he spent 9 months in a jungle practicing... And they are slow...
Get the swingaway. Reasonably priced compared to some of the other options offered here. And don't worry about a bit of rust appearing on the cutting disk. It's not going to rot
off and dissolve like a prop shaft with out a zinc. It lives in a drawer and gets a bit rusty. Keep it oiled a bit and you won't have much trouble with it.
Hell the swingaway living in my kitchen drawer is the one from off my grandfathers boat that sat in the galley
for at least 15 years and is fine.
I got a new one for the boat so the colour would look better ; -)