Sergio Bonilla makes these mounts. Shipping from Medellin, Columbia, I found the packaging ironic. Hopefully that’s not offensive to anyone. You can buy on Astromart.
Sergio is a great guy who is responsive to questions and orders.
I paired the mount with a grab-n-go tripod from iFootage. With my Borg 100ED, with and without a Linear Binoviewer, it’s been very solid and stable. It has one horizontal rotation lock, and two on the altitude. I use a Svbony one-clamp vixen style to affix the Borg. It seems very sufficient. With a binoviewer and medium weight eyepieces, I have to add weights to balance the scope. The mount handles the weight well, but everything is easier without the binoviewers as you’d expect.
Motion is very smooth. The locks can be used to adjust the motion tension, but loose they are great if you’re balanced.
There are two pairs of screws (two sizes) on each mount adapter spaced at 35mm. I’m not sure the sizes, but he can tell you. The crossbar can be adjusted left and right to some degree. And it is possible to adjust the alignment of the two mounting adapters if they’re not perfectly aligned. I don’t have a second scope to attach yet.
Overall, a very nice hand-guided alt-az mount. Very solid. Well made. Smooth. Good value.