The official word is that
DSMX is only necessary if you fly in environments like Joe Nall or huge indoor events.
This week at Muncie, we had 4 crashes with AR500 receivers when total control was lost, AFTER QUALIFYING FOR THE ANNUAL NATIONAL CONTEST BY TYING FOR 1ST PLACE in each event.
Number of flyers at the AMA site
1st instance: one
2nd instance: 10
3rd instance: 12
4th instance: 1
Flights were made in DSM2 even though on the last crash I loaned out my upgraded DX8. (backwards compatibility) If Spek would acknowledge there were more reasons for the switch, I wouldn't be looking at other systems.
I have spoken with them on the phone and the transmitters and receivers are going back. In the first 3 crashes the voltages were btwn 5.0 and 5.07. Failsafe throttle cut never worked on the last and the battery was in many pieces when it hit the asphalt. We only salvaged the tail skid on that one.
In any event, in spite of qualifying for the biannual contest in Vegas, we won't be going because :
We don't have any models left and not enough time to build replacements! But the father son team who got all our 72Mhz equip two years ago will be...