The main two advantages I see with this bolt and aider system are 1) no need to drill the offhanded bolts (left side for me), and 2) you would only be drilling half as many holes. I need to try this out. It's a shame I don't have too many places where these are legal for me to use anymore, but in places where the landowner is cool with it, they are the preferred method for presets.
Cons:
You’re drilling all but one bolt above your head.
You need dexterity to remove the aider from the bolt. Thick gloves sometimes make this difficult. I use an aider with a small loop, maybe a big one is less likely to pull a bolt out of the hole. I’ve never done it. But I could see it happening to someone not paying attention.
You need to practice once or twice in daylight with no time pressure to figure out the best bolt spacing.
If you don’t use an aider with a second loop halfway up the aider, you’re standing on one bolt on one foot drilling a hole above your head. Not tenable. Follow my forthcoming advice on aider build.
You will drill one extra bolt hole well above your platform because you need the aider to get to that height.
Alignment of last bolt you stand on and your platform- I typically use ring of steps with hybrid so it doesn’t matter. But when using a stand or platform, you need to plan your 2nd to last bolt where it makes it easy to use that as your plant foot, and the aider foot is the one that first transitions onto platform. This is more of a fine detail.
Getting the aider off your foot once set - if you’re not flexible or have a huge belly it might be a challenge. I also have forgotten to do it, and had it make noise with a deer coming in and me moving to make a shot.
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Aider - I use a sewn original versa strap for an aider. Girth hitch it around my foot. It’s essential(at least so far for me) that it stays tight, and that the girth hitch comes off the inside of my foot, not the middle top of my foot. The benefit of the versa strap is that it has multiple loops in case I have uneven drilling scenarios. But most importantly it has loops halfway between the end and my foot. Why is this important?
I drill two holes from ground. One bolt at 36”ish, once at 72”ish. My aider length from bottom of boot to top loop is 54”+ extra for wrapping across face of tree. You need to test this out if you intend to make one, but the versa strap is 72” long. Girth hitch probably takes up 8-10” on my boot, so that leaves about 6-8” of extra to make up the distance for wrapping across face of tree. Hang loop on bolt above head, wrap aider across tree and it puts my foot 18” off ground, opposite side of tree from my bolts. Lineman’s belt on, step up on aider. Set lineman’s again, step up on bolt at 36”. Set lineman’s. Take aider loose from bolt that was overhead and is now at waist level, laying the aider over my lineman’s belt so it doesn’t drop. Fish loop in middle of aider onto that bolt, and now I can stand with both feet even, and lineman’s belt supporting me. This allows me to drill the next bolt overhead with proper balance and both hands.
Rinse repeat.