I have used both Rom Air and Spring Air retracts in the past. I have had little problems with either. I like the fact that you can transport the gear retracted with Rom Airs. ( makes for more room to stack two wings in the car).I guess it's a little nostalgic on my part but I like the Roms for my old pattern planes. Your point is well made regarding the sequence valve. If you set the system up properly and don't fly off of a really bumpy field there shouldn't be a problem. I rarely cycle the gear more than twice on any given flight so losing pressure isn't an issue.