And to think there are only a few select buttons we can push to go up or down!
There's a show on TV called "How things work" (or something like that) which gives such a new found appreciation, for so much so many take for granted.
One can never know too much, IMO.
I'll ditto Dave's understatement "looks challenging".
Good for you, Tony!
Keith - Still Lovin Livin
https://youtu.be/o-R41Rfx0k0(a short video tribute to the PB members we met on our 5 week fishing adventure)
Formerly: 2ac LMB,HSB,BG,HBG,RES