At our club, we have Spread Spectrum pins on the frequency board and require Spektrum transmitters to have a tag just as all other transmitters. Been doing this for a year now and it works fine. By still using the frequency board and requiring members to attach their AMA card before taking a pin, we manage to control the number of transmitters out of impound and verify AMA membership.

We are going to have to add more pins for these transmitters this year as more members are now acquiring these radios. Just two of us used the DX6 radios last year and now I know of four members that have the DX7.

Personally, I am converting all of my planes to Spread Spectrum. I have been using my DX7 since beginning of December. Great system.
The Dx6 was fine but the DX7 is far better in my opinion. I use all three types of receivers but have only flown with the AR6000 & AR6100 so far. AR7000 is in my SeaMaster and ready to go.
Joe