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I took my selfmade porty up in the tree a few times, as in special circonstances. It's like the big version, a bit heavy but very doable. It is usually when working alone, when there is a good risk to hang the limbs on the way down, like in a big crotch between two coleaders. The advantage is...

One advantage of the porty is the possibility to be loaded from every directions as is (without the top sling of the Stein's), it self adjusts accordingly, while the strapped bollard is limited to the top (a pulley can be added above but complicates the setup). A good use of the porty is as a...

Same for me. Maasdam's rope puller gives a 10/1 MA on hand pull and a 60" range in one shot (for my rope). The fiddle blocks can't compete without going motorized or having a crew pulling on it. I see just one real advantage with the fiddle blocks : that's a release at will of the load under...

I have used a couple times the maasdam with a prussik on the porty or the bollard. Handy when needed and no need of progress capture. But the setup is slow and annoying, even if it doesn't look complicated in theory. Maybe just a lack of training. The fiddle blocks don't appeal me much with the...

"Like a sheeve" is the issue here. I can see that for the small moves (adjusting the moving TIP on an high line) or the light loads ( redirect for the side control line of said TIP), but not for the actual lowering of heavy loads. Long runs and hight friction would give too much wear at the...

Basically, the bigger the sheave, the gentler on the rope and the easier to turn (lever arm vs friction). For climbing, the load is very low, so the rope can take a small radius sheave without problem. Even just a biner can do it in a friction saver. Downside, the sharp turn induces a lot of...

Will it be for climbing or rigging? Completly different game.