Those roller things look interesting! I've never seen them nor do I know anybody who uses them. Straight line? Fairly straight, but in quite a few places there's all sorts of tire hazards that require a quick duck to the left or the right. I'd think that would be a better indicator of skill---able to quickly manuever like that without going down. Pacelines are pretty uncommon around here so I don't have a chance to really test that skill.

don't look down, look straight ahead

Do I ride a straight line ?

Man my posture and toeout requires constant herding, lol.

Diamond Frames,,you all look down alot..

Recumbents,,my head and eyes are up looking out, never noticed my tire line, I'll have to give it a look see..

As for the start wobble,, yes I wobble a bit, for a few feet,,IF I look down at the front wheel..

There is always a very fine dusting of sand or whatever on the bike lane on Longboat Key where many riders of all abilities, but mostly paceline or sporty types, travel up and down, so their trails are visible. I took particular note yesterday of their trails: the the majority don't deviate by more than a couple of inches either way over the 11 mile stretch.

At least one local rider has told me the rolling resistance is less riding on the paint, if safe. Have not seen any data.

I ride a 2' wide line. I think that the squirrel riding technique causes others to give you plenty of room. Probably the faster that you go the straighter the line would be. I once rode with a guy that would swerve 3' side to side when he started off. He had a severe balance problem caused from a car wreck. I liked riding with the guy because all the cars would pass giving the maximum amount of room.

I have some rollers and there is no way that I can ride them. I am thinking about using my climbing gear so that I can be suspended above the bike and then try the rollers. This way if the bike runs off the rollers I will be left hanging with the bike clipped to my feet.

Seems to make sense, being that the paint has little glass beads in it, in many cases. Friction and traction both would be lessened, IMHO.

Yes, the line has less rolling resistance. But yes it has less traction, too. Plus, if you're on the line, you'll get squeezed by cars more often. Personally, I don't think the benefits of riding on the line are worth the risks.

Just don't think about how you are getting the point you are looking at and let your bike take you there. Works exactly the same on my motorcycle. Not sure HOW I get there but I always hit the point I'm looking at.