You could make kveik your house yeast and not worry about temp control.
Actually, you'd still want to be able to run it cool for clean beers. Some temp control is a bonus.
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I've pitched as little as a few flakes.
I have also moved to much smaller volume of trub to dry; struggled to get that large amount dry.
I'm in a similar situation - don't want to educate myself but want to tweak. I'd plug those values into a free spreadsheet (Bru'n water is what I use) and mess around. I've been happy with small adjustments I've made.
Kit instructions often tell you to move your beer to another vessel for secondary fermentation. Current consensus is that this is unnecessary and even detrimental to quality. Keep it simple.
Do it once, the right way. Control panel + 240v + 5500kW. It does not have to be complicated or necessarily that expensive, but you will be laughing at the end of your 4 hour brew day.
Have a version of this fermenting now - same grain bill, kveik (at 95 degrees!), mandarina bavarina, sorachi ace, lemondrop. Because that's what I had.
I'd probably drill a hole in the hex wrench piece with a small bit and then use an appropriately sized extractor.
Getting the hole and extractor size to match up is a little finicky - I've had mixed success.
Either way, I think you're looking at destructive removal.