After struggling with intake leaks from the DPO's mangling of the isolators, I opted to go with a new Weber mounting hardware. This includes Thackery washers. The instructions state that there's a certain gap necessary between the coils. That's all well and good up top, but I can barely reach the bottom studs, let alone see them. How can I accurately set the gap on these? I'm using nylock nuts, so I can't even feel when they're beginning to snug down. What's the secret? Mirrors?