I gave Garhauer the measurements of my M382 mast, boom, and hatch installation and asked them if they could manufacture a rigid vang that would fit in without interference with the hatch, yet work properly. They said, "No problem". Not only did Garhauer custom manufacture the rigid vang plus boom mount for my Hood Stowboom, but they also make a custom saddle for the mast mount. When I wasn't quite satisfied with the fit of the mast mount, they made a new one and shipped it to me overnight at no charge. When my heavy Stowboom seemed too heavy for the springs inside the vang and I expressed concern about this, they immediately shipped a new heavier duty spring section to me, again at no charge. It turned out that the original springs that they had selected for my installation were just fine.
The vang has performed flawlessly and clears the hatch with room to spare. Best of all, the entire package cost just $340 and comes with a 10 year unconditional warranty. It's hard to go wrong with Garhauer.