Well... I'm glad you have many good memories of the ST1100 you had in the past. It's a great bike.
Now... you are somewhat older.... and so is also the ST1100.
I love my ST1100. And I hope I will be able to keep it running for another... well, as long as posssible.
But everything as an end, someday.
What starts to worry me, about the ST1100's age, is the availability, or the non availability, I should say, of the parts.
Some of them are still available, others... not at all. Or you have to search them for weeks or months.
So, maintening them is becoming challenging.
Now, with all this being said.... I'm sure you can find one at a very decent price. Just Go and Get it !
Whatever I said, we have to have fun and enjoy life while we still can.
Chris