Nasty boy DK! Canucks only use sphincter-pinching to make complex illustrations or long text messages or in the snow. That’s why we drink ‘your’ beer in summer & save ‘our’ beer for winter - the higher alc% keeps the S-pipe free & clear of ice plugs!

Actually, I got the pinch / fuel cut-off part down pat even on the thick tubing. I drill the shutoff wire ‘U’ right adjacent to the motormount firewall ring so it shuts off flow with less servo grunting vs an outright squeeze against the firewall. But last summer I noticed the engine going lean in the air even if it was slobbering on the ground, which it never did before. I finally traced it to spongey, thin wall sport stuff when I changed the lines. Ill check out your medium grade rec, thx.

Another question since you are still an Electron Sicko. On my Q40s I followed the local tradition of installing rubber grommets in the glass fuse so it doesn’t eventually cut trough the fuel lines with vibration. But ¼” od lines require big bejesus donut size grommets & 3/8” holes in the fuse. Have you ever seen/used braided sheathing material like for protecting cables?

http://www.techflex.com/prod_PTN.asp

http://cableorganizer.com/wire-management/