Yea, I was checking out an MR Mack in the yard and it utilizes a tube extension(Donaldson). I'm going to try and borrow that one for a long time, do a little recession fit. I'll measure on Monday, cool thing it has a stainless steel rain cap. That MR is supposed to be fitted with a concrete pumper, but it's going to be at least a year, if ever. It had a Schwing pump, but those things get shipped over seas since they all drive on the other side, they leave the truck. With concrete mixers when it rains were mostly parked so I'll plan on tinkering with that snorkel, it looks like a paw or hoof sticking in the air, and it probably makes noise to bote. Also, the air should be cleaner up a few feet, away from turbulence or surface tension or yeah. Any more tips on securing this thing? The MR is fitted with a steel tube rail for support.