Interesting to carry the scale ruler right on your LCCA card. Good way to have it with you at all times.
Exact adherence to scale is just not a major criteria for me. I go by "look and feel" which is a judgement call based on, well . . . how it loosk when on the layout. The best example with regard to trucks may be the New Ray '53 Mack the New Ray much newer model year Peterbilt. Both are just about exactly 1:43 scale, but I use the former (alot) even though it is on the edge of being too big in places, but never, ever the latter - it is just too big, because of the scale added to which it is a really big truck. With regard to cars, as I've said I like 1:43 as it makes the cars a bit larger and that just works for me. I have recently found a great use for the New Ray '50s cars which are anywhere from 1:47 to 1:53 - I have an area of my downtown where their use along with a slightly compressed set of printed storefronts, creates just a bit of forced perspective. They work nicely there.
