All we do, all day every day. I have yet to try SRT, want to, but I am in pretty good physical shape, minus the major spine injury's, but hey, who's counting.............3, so I stay with the old ways, like it too much.
At 42, I weigh around 137lbs, have a 8 pack, looking for the 10, and can hand over hand for hours. Teaching my kids the same way. Cept I am making them learn olD school first. I have not even taught them foot locking yet, just to the point to belay the line with their feet. Just this week I let my oldest clip his seat together instead of traditional one side to one side on the seat. I have foot ascender and some other fancy gadgets, but they stay on the truck most of the time. The only new thing that I have added as of late was the caterpillar friction saver, I really love those things, make it so much easier, very little friction. My middle boy, who has taken the most liking got it, is going to be real good, kid is 180 and freakin jacked! I made him hip thrust about 40ft last week into a birch over a spruce, so as he was going up, the spruce was poking him, so he went as fast as he could. Once he got to his destination and looked back, he was surprised to see how far he went in such little time. You should try it tramp, would be a quick way to drop some pounds and get into that saddle ya want!
I hate spikes too, I use them when I have to, but even on removals, if I have I line set, off come the spikes. I use them mainly when bucking the log on a removal when there is no bark and its hard to keep a line in place or when doing a removal on a "pruned" tree that was actually lion tailed so bad the tree dies. Some of those long aas, strait and smooth branches are not easy to get out to with out any lower branches to climb on