Minority Report Follows ------
I have limited direct experience with Tolga. I found him to be a really nice guy and a really fair guy. At the same time, I was not impressed with his actual level of knowledge about how things really work. Putting together high end mounts and cameras and focusers is the easiest thing in the world to do. If you want to do something hard, help a friend get an Edge 8 working on an AVX one night properly focused and guiding with a DSLR on the back. Putting a PW20 on a GM3000 is a matter mostly of being able to lift the weight.
I would not judge anyone's expertise based on projects with unlimited budgets. Observatory setup gets tough when you have to work out how to do things well without spending top dollar. YMMV
As a consulting observatory engineer (focused on medium-to-large professional observatories) I have to say that it is pretty-hard to be an expert with every conceivable astro-widget out there and getting a bucket of random, malcontent, astro-widgets (AND ALL OF THEIR DRIVERS!) to all play together in harmony 100% of the time is a pretty-high bar that not even I can claim to have mastered all the time. Sometimes it's a matter of sitting down and spending the time to figure out the quirks, bugs, limitations and unique vocabulary of each widget involved. Sometimes it takes emails, texts and phone calls as well. And some things never seem to want to play well with others.
Anyone who claims that they have mastered every possible observatory equipment configuration imaginable is kidding themselves... and their customers.
In my experience, Tolga is a dedicated, hard-working, honest human being who doesn't let his own pride get in the way of doing his absolute best for his customers.
What more could anyone ask?