Well I bought a 45mm Chinese P and C set (marketed by Huztl but branded Farmertec) because it was priced to move but will probably use that piston in the OE 45MM cylinder if we can salvage it. The Chinese cylinder ports are really shoddy and need significant clean up so I will probably keep that one as a spare and we will port it so it flows decently.Nice, I forgot about that one. Did you go with the 346 P&C.
That should be a piece of cake after working on the little mac.
From what I have seen, they are just like a 353 when cutting. The only major difference is the air filter access.
I love the 353, a little better lower end torque(if that can be said for a 50cc saw lol) than the 346.
I also like the 450 rancher which is a tad less on power than what yours should be, and only has one bar nut(worked just fine for me though).
Let us know how it goes. I have a 353 I may do also as I bought it scored, we'll see.
FWIW, fellow AS'er Mattyo did a test of a bunch of different cylinders and the Hyway one came out on top even over the OE 346. If you want that 353 to rip I would go in that direction.