[QUOTE=ash 26;11745757]And where you not told that there there could be a chance that it could blow up and to send it back to Wren before you run it.
I know of a couple that have 17 and 22 h on them with the upgraded compressors and no issues what so ever[/QUOTE

Yes, I was warned that it could happen, but was told that this one was checked by the wren factory and thus was OK. At that stage I was not aware of the scale of the problem, but bought the engine in ignorance. I was buying a WREN engine! How bad could it be? Surely, if there really was an issue, the owners would have known of it? If only I knew then what I know now!

I also know of a couple with upgraded wheels that is now resting on the bottom of False Bay in Capetown, their owners fed-up with having to pay all the time!
http://www.rcuniverse.com/forum/rc-j...-broken-5.html