My car is sometimes loaned to other family members for extended periods and is also left in open-air(port) parking lots for a couple of days a few times a year. In these cases, I'd like to be able to remove the LI heads without having to go through the trouble of removing/reinstalling trim, seats, fenders, etc.
I'm an EE and know my way around making modular cables, etc. and have the proper crimping tools. The obvious way is to buy 6-conductor cable and run it through the firewall on the front and the trunk in the back, and use either jacks or a female-female coupler to connect to the LI head cables. Two questions:
1. Is the additional length (about 8-9 feet max) going to affect signal propagation to the heads in any noticeable way?
2. If so, or maybe just for neatness sake, say I clip the LI head cable at 3-4 feet and crimp a new connector on. [Cliff:] Assuming I do it all right (smooth side towards the top of the connector, etc.), will this affect warranty?