you can try that "poor dude" method that I did while ago , also I did it for fun

and I did wind from 10" to 7" , not from 14" , but the same idea.
Place the reel on that board with cup-hub that is typically in the 10" reel box, place next to the machine and level it with the machine's reel tables, path the tape through the tape path and onto take up reel .
I've made short video, it's easier to show

link:
http://www.mzentertainment.com/video/10_inch_to_7_inch.wmv
also it may work or may not work too well ...