M5 vs M7 wing performance

[akholland]

I picked up a m4 with M5 wings as a project. One m5 wing has a tweaked front spar from a tree impact and the other wing looks repairable. M5 wings have the tip tanks and droop tips.
I'm looking at picking up another m4 for parts to use the wings off of as I cant find many M5 around for parts. My question is, since I would have extra wing parts, Can a guy take a set of M4 wings and install the tip tanks and splice the spars to add a few feet of wing? Is there even an STC for a spar splice on a Maule? What would you do?

[maules.com]

As I understand it, though there used to be a spar splice kit, Maule or maybe FAA has withdrawn it so now you have to replace the spar unless merely updating the old M6 to new M6 wing.
You can put the M5 aux tanks in the M4 wings.
If its a round tip M4 wing, it can be updated to droop tip wing.

[akholland]

Just realized that the m4 wing im looking at is a late model 30'10'' which is same length as the M5 wing, which as he said above the only difference is the extra flap length on the M5 which I doubt would be worth all that extra work to convert? Sounds like tip tanks is best way to go and call it good?

[akholland]

Sounds like just tip tanks it is then!.. thanks

[akholland]

Wings 101
Early M4 round tip 29'10" 70.5" flap 0/15/35deg ?" aileron
later M4 30'10" droop tip, 70.5 15/35 then 0/20/40 flaps, 69.5" aileron
M5 30'10" droop tip, 90" 15/35 & 0/20/40 flaps, 61.6"x15" aileron
81-86 M6 32'11" droop tip, 120" -7/0/24/40/48 flaps, 51.2"x16.25" aileron
1986 on M6 32'11" sqr tip, 120" -7/0/24/40/48 flap, 54.6"x17" aileron
'84/93 MX7 30'10" sqr tip, 109.4" -7/0/24/40/48 flap, 53"x17" aileron
'93 on MX7 32'11" sqr tip, 119" -7/0/24/40/48 flap, 60"x17" aileron
MXT and MT 32'11" sqr tip, 114.6"/119" -7/0/24/40 flap, 60"x17" aileron
'84/89 M7 33'8" sqr tip, 126" -7/0/24/40/48 flap, 53"x17" aileron
'89/93 M7(A) 33'8" sqr tip, 126" -7/0/24/40/48 flap, 60"x17" aileron
'93 on all 32'11" sqr tip, 119" -7/0/24/40/(48) flap, 60"x17" aileron
all flap chords are 15"

someone correct me if you see a mistake

Take a look at N6272m it's a 1978 m6 235. Your chart says m6 earliest was 1981. Heading to pick it up, I assume I'm buying a 120" flap model? I'm upgrading from the m5

[maules.com]

It is likely that it was an M5 converted later to an M6. This can be done with a little weld work. Sometimes done after an accident.