my guess is that FRONT mounted panoz will NOT have this issue.
still is is GOOD HABIT to inspect the panoz for any signs of sealant breach or water.
this IS part of the regular/annual inspection of all the gooz used on a stream.
having a pressurized leak test ONE TIME may be a good thing in WET parts of the country.
(the problem is even AFTER finding and sealing, movement will create NEW gaps after testing)
the FRONT panoz may have OTHER issues,
especially IF there is a LARGE access door under them.
OR batteries have been added OR larger lp tanks or gensets or other EXTRA weight items.
SHORTER streams 16-19 or
SHORT double axles (23) may have fewer shell/frame integrity related problems...
as the frames GROW longer and the weight goes UP...
movement and stress in the shell or at the frame/shell junction OR in the window cutouts...
more on 07 issues (photos start in the 100s posts) ...
and a more general expose' on shell/frame things...
and the VERY LIMITED VALUE of sealant at the lower beltline.