Tissuing adds a significant weight penalty over just dope.
If you want best fight times, skip the tissue.
I do agree it will add durability. So would using iron-on Monokote for the wing.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !