I have seen a wide variety of picks for the tubular locks.
I have a farily old (about 20 years old) Majestic tubular lock pick. You can see a picture here ( http://www.extremely-sharp.com/majestic-tubular-lock-pick.html )
As you can see, it has a brass collar which is permanently staked into place, which provides tension on the sliding pins. Basically, this tool is a sort of automatic impressioning tool; simply set all the sliding pins flush with the end of the pick, insert, and rotate back and forth until the lock opens.
The flaw is that the tension across all of the sliding pins is the same, and can't be changed. I have had good luck with this pick on inexpensive tubular locks.
I have seen some newer tools that have a variable tension, which I guess is an improvement, which uses a threaded collar that tightens or loosens on the shaft. This would be a step up, but it would still be the same tension on all pins.
I believe it is common knowledge that 'good' tubular locks are made with different springs at each pin location, to change the per-pin tension, which makes a simple tool as described above fail to work.
I have seen two tools that seem to be SPP tubular tools: the Peterson PRO-1 (http://www.thinkpeterson.com/tubularlockpicks.html , US$425) and the Pro-Lok PKA2 ( https://www.pro-lok.com/pc-281-79-pka2-deluxe-tubular-ace-pick.aspx US$273 )
I have an American padlock with a tubular lock (owned legally) which I would like to experiment with, but my old Majestic pick won't do the job. I could bust off the brass collar and try to convert it to an SPP tool but then I'd lose the speed of the 'impressioning' type attack for cheaper locks.
My question is; is there any tool which will efficiently work on the American padlocks or other tubular locks with varying spring pressure?
The Pro-1 looks great, but a bit expensive. The PKA2 might be doable. A third option is one of the newer tubular picks with adjustable tension; turn the tension all the way down and attempt to SPP with the pick.
Are there any other options?