My O.S 46FX recently started cutting out in the air, I have about 3 gallons through it so there may be some issues with it.

I'm sending it in to Hobby services to have it looked at.

In the meantime I need a new engine for my Superstar 40 trainer but I cant decide what to get.

Magnum XLS 46
Thunder Tiger pro 46
Another O.S 46FX

Other options?

I would like to try a chrome sleeve as from what I understand they last longer than the Nickel sleeves.

Any thoughts or suggestions appreciated
Dbow