Hi guys , I'm trying to make myself a leakdown tester. They're over a $100.00 up here . I figured it's cheaper to make one. Any you guys ever do this . Got any pictures to show. I was going to use a regulator & gauge off a paint sprayer with adapters and fittings but someone told me that won't work.Why not? Also , can someone clarify exactly how you read these tools. Is the air continuely going into the engine at 100 lbs or do you shut off the air and see how much it drops. I have not seen one of these in operation but I hear they're pretty neat. What do you use to lock the engine from turning . I made a tool that works excellent for this.