We got lots of macro lenses, lots of opinions about what's best and lots of advice when you ask for it. (the cameras are quite good too).
Welcome aboard

Having bought such a wonderful beast as this and having a Pentax to use it with, one's first question is, "why is the guy selling it?"

The colours are gorgeous. You must have got quite wet taking the macros

Sort of, "cross this, if you dare".

That's good news. Your work is admirable, to say the least.

Right at the beginning you mentioned 'old glass'. All of the K series will accept old glass. Some of the M42 lenses are superb and you won't have to pay an arm and a leg for them: e.g. Jupiter 11A 135mm; Helios 44M-4 and M-7. Coming closer to home the Pentax M-100mm macro and A-50mm macro are a bit more expensive but as well as macro, they double up as excellent walkabout lenses. If you start buying Takumars you will be well on the road to Lens Buying Addiction (LBA) because their quality is incredible. OK, there's no fast auto focussing but on a standard Pentax or Takumar 28mm, all you do is line up everything coloured orange (red?) then point and click! (takes the fun out of it though).

I have to differ. Flakey paint is super with all those tones and textures.

Good heavens, I had no idea about that at all. I know films were kept refrigerated (a girlfriend had a poly food box in the fridge full of film once upon a long tme ago) but this distinction is a new one for me. Thank you for that.

Great news it is but I'm suspicious of the "Professional" tag. Do they intend to double the price of it?

If it's working with the cable release (and I assume with the IR remote) you can still use it. You could even be an exclusive type, having a dedicated permanent tripod camera