I use Tamjets. I always end my flying day with my gear retracted to pack away the plane, then the next time I fly I start my day at the field by turning on my receiver first, because the fail safe reads zero PSI it actuates the "gear deployment" servo (no TX required for this check), then as I fill it with air my gear deploys. This is my Tam fail-safe pre-flight check, I deploy my gear like this every time & have never had a gear up landing.
good luck, Jay