Great question OP - thanks for starting the discussion.
And thanks [MENTION=130999]Inv4drZm[/MENTION] and [MENTION=167764]Whammy[/MENTION] for the .xlsx ideas ... I've "borrowed" them and then gone overboard (way overboard?:noidea

on developing my own workbook (hey, Im an accountant... I love me my .xlsx's :nerd

. Its not perfected yet - still working out exactly what I want to track, some service intervals, and some formulae and links, and what not :ranger:... But I am liking it. Attached pic 1 is the "dashboard" and pic 2 is an example of a detail sheet... cells in dashboard are linked to detail sheets and formulae drive calc's and colors. (yes, I know :nerd
Im also adding the info to Toyota Owners .com ... for now... Its a good concept but it is glitchy and not as user friendly as I'd like... so not sure how long my patients with it will last.