I think it's great. We need something like that. I have been thinking about something similar. I've seen photos of of a Forum member's AS who has put full 6" blue numbers where you would put the WBCCI numbers. This looks great also. Since I display my red numbers, I was considering putting 3" blue numbers below the word AIRSTREAM on both the front in back. That size would be readable at a pretty fair distance.
SuEllyn & Brian McCabe
WBCCI #3628 -- AIR #14872 -- TAC #FL-7
2015 FC 25' FB (Lucy) with HAHA
2005 Suburban 2500 Quadrasteer (Olivia) & 2011 Silverado 3500 (Fred) with Outfitter Truck Camper (Ethel)