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Played about with an optimal length pure T COLL alg, got this
x D' R' U R D R2 D2 R U' R' D2 R2
Can be done without regrips, slower than two sunes still though probably >.<

Some nice PCOs:
U' R U R' U' R2 U2 R2 U' R2 U' R2 U R U R' U'
U' R2 U2 R2 U' R2 U' R2 U R U R' U2 R U R'
U' R2 U R' U R U2 R' U2 R' U2 R U2 R' U2 R U R'

Seriously, these must already be on the forum somewhere, a quick search hasn't revealed much except a thread from 2008 which doesn't contain these algs.

Anyhoo, I was poking about on TellerWest's YouTube channel last night, and saw this vid on rotationless G perms. As they're adjusted versions of the 'beginner' algs many will know from Badmephisto and elsewhere, they're super-easy to learn, and I've knocked about a second off my G(d) time already just by cutting out the rotation.

G(b): R' U' R (U D') R2 U R' U R U' R U' R2 (U' D)

G(d): R U R' (U' D) R2 U' R U' R' U R' U R2 (U D')

The other two G's (not shown):

G(a): (U D') R2 U R' U R' U' R U' R2 (U' D) R' U R

G(c): (U' D) R2 U' R U' R U R' U R2 (D' U) R U' R'

Really nice algs, with execution in Teller's inimitable, finger-trick-happy style!

These are the ones I use, except for Gb and Gd I move the D/D' from the end to the beginning, so there is no second (UD') double move. Also I don't do U at the start/end of PLLs either, as I AUF last.

They are called the French G perms, I think because they first appeared on Sebastien Felix's site.

Here's a random 6-cycle of wing edges for even cubes, where the two bold moves represent the orbits of wing edges you affect: f2 u' r2 Uw2 S' r2 S D S' r S y Uw d r2 u f2 (22,16).

Using the same idea, here is a 6-cycle algorithm which doesn't preserve the colors of the centers using a similar idea: r2 S D' r' D S' (7,6)