Hi Gerald,
Believe it or not, the early RV-4 plans showed the MC's mounted inverted, like me, you just followed instructions! I too flipped the MC's on my RV4 way back in the 90's when my teflon lines began leaking after 5 years. I replaced all my lines with braided steel from NAPA, all the way to the wheels. Excellent fix, I definitely mounted them "up-side right" in my HR2. Later a friend asked me to "flip" his RV4's MC's. It was actually fairly easy, but get some plastic line plugs or rags ready.
1. Remove bonnet/forward glare shield.
2. Place old towel in floorboard below pedals.
3. Remove brake lines from MC's, remember which line went where, it matters.
4. Take MC's to vice, clamp and hold. Turn fittings to face "north", take care not to strip them. You can remove them, place pipe seal around them and re-install. Slightly offset them in either direction for clearance.
Repairing leaky MC's is no big deal, the key is getting the proper O-rings. Get them from Aircraft Spruce or an aircraft parts store, they won't leak. Take them apart by first removing the upper "u" keeper with pliers, carefully so the spring doesn't shoot across room! Then using small snap ring pliers remove snap ring from upper MC. Pull out plunger, clean inside with mineral spirits, feel for burrs. R&R O-rings Upper is Part#ms28775-110, lower is 28775-113. Re-assemble MC.
5. Take MC's back to RV4, re-install in proper direction. Note, clearance on lower rudder pedal will be close, but OK. Use washers as necessary. If lines don't quite reach, you may have to replace with newer/longer.
6. Service brakes from wheel brake cyllinder.
I use a hardware store oil can with clear plastic line attached to lower fitting with 1/4 in box end over fitting. I have a fitting attached to the top of my reservoir with a line going into a pill bottle. I can then pump until it overflows into the pill bottle. I then tighten the lower fitting, remove the upper fitting, remove 1/2 straw-full of fluid from the top of reservoir and re-install cover plug.
7. Check for leaks, firm pedal.
Smokey
HR2