Jeremy, I have been using the Spektrum TX module in a 10X since shortly after it was introduced and have made probably 200+ flights since then with no problems. Most flights have been with a Boomerang XL and Tam's F-16 with an AR9000, with a handful in an L-39 with the AR9100.

You do need to be careful with handing the TX, as the antenna to module cable is exposed and a bit vulnerable to rough handling. I've added a "check cable connection" task to my preflight checklist. I do disconnect the antenna every day and am careful not to over-tighten the connection. So far no problems.

The AR9000 is fine, all of the servo connections are labeled and the channel number relationship is 1-1 with the 10 channel PCM RX's (except for Ch 10... there is none). It has the same current carrying capability as the R2000/950/955 Rx's and was a pretty much a drop-in replacement (except for mounting and cabling in the satellite RX's). You do need to change the modulation setting to PPM in your TX model programming, but no other changes are required (unless you are currently using all 10 channels, in which case you'll need to free up a channel using a Matchbox or Y-harness somewhere - I tied my nosewheel and rudder together).

Have fun -

Barry