I was curious (but also lazy) so I went and checked Wikipedia. According to that source, the newest model of Ford F-150 is the fourteenth generation one, so let's look at the numbers for the top-of-the-line Raptor (or what I assume is the top, I'm not a pickup person). Assuming largest manufactured dimensions in all cases for the truck and smallest for the tank:
Can confirm that I experienced a similar problem with my DIY order, and I reviewed my selections multiple times to check that I had in fact selected everything that needed to be selectable before giving up and starting again. (I missed out on Batch 1 <sniff>.) If it helps with debugging, I'm happy to send my current order number to that support address for comparison (my final choices were identical in both cases).
OpenBSD's mascot is a pufferfish. If you're talking about the image at https://www.openbsd.org/71.html, that's a pufferfish on a surfboard under a curling ocean wave. Where are you getting a Trump vibe?
Found another greybeard Mac user! I learned this trick under System 6 and used it religiously until just recently. (My clock keeps perfect time, but seconds don't update, under MATE Compiz. Go figure.)
Ford F-150 Raptor length 232.6" width 118" height 80.7" curb weight 5,540 lbs.
Sherman Tank length 247" width 103" height 108" mass ("curb weight") 66,800 lbs.
So in terms of size, sure, they're kind of comparable, although in a head-on collision I think I'll still take my chances with the F-150.