You mean you think AR27 was built by Nestor Salerno?
They're nearly all seriously beautiful cars, whoever built them..!
AR14: built by Greppi ?
AR25: built by Nestor Salerno ?
I do not have conclusive proofs about these lasting ones...but I found solid elements for 2 of them #13 and #17.
Those 2 puzzles can be solved just guessing at them.
For all the others, I just left some thoughts you can work on, to keep the fun on, but there are no news.
Regarding your guesses, I think #25 an 27 could be by Salerno and #14 by Greppi, but with no further proof, I already assigned them to oko94, Wendax and Carnut.
You can guess at the last 3 ones...I know the answers.