Yes, zruncho is gunstar . I've bought a few mounts of him through ebay.
My current config is gunstar + contessa 2.5mm rings. That give me a build height of <10mm:
View attachment 905449
Standard blaser mount:
View attachment 905450
If you want the absolute lowest for 30mm scopes, I've fitted extra low leupolds (1.5mm) to the gunstar saddle for a totalt bh of 8.5mm:
View attachment 905452
(But the leupolds suck, they turn rust red once the weatherman mentions the word rain...)
And you have to be aware of the potential problem with both the cocking lever vs ocular and the scope bell. Some scopes have a big bell, and that might limit how low rings you can have (bell touching the saddle).
Another trick to fit a big scope as low as possible is to have the mk1 blaser r8 cocking lever. When I used a Z8i (which has a stupid big ocular), I replaced the lever button. The old style (straight) is a few mm lower than the current style.
View attachment 905456
And if you are opting for holos, gunstar make an option that really makes it mount low:
View attachment 905459
The lowest Contessa rings I could find are the 3mm rings:
https://contessascopemounts.com/en/sp01-o30mm-h3mm/https://contessascopemounts.com/en/sp01-o30mm-h3mm/
This is very informative and helpful. Thank you for taking the time to do this.