Jrotten and Asura, I thank you both for the thoughtful replies.
Jrotten, I think I was originally thinking that I would tray this bag once it was ready-- but like you did, I'm thinking that I may let this one ride in the bag since it's my first try.
Once I get my LC stuff in order, and I get more opportunity to nock up bags without having to use grain, I think I will be far more inclined to get several bags going so I can experiment. (I also have a Pan Cambo Jamaican print I'm looking forward to getting to agar in a couple months when I can dedicate some more permanent space to it-- and those will definitely be bag-to-tray)
Asura, it was actually CaptainFuture himself that gifted me these magical spores, so I, too, am inclined to lean towards his method-- it was with him (and his fantastic grows) in mind that I considered the option. I have not used straight peat in the past, but I do have a bag of it (it contains those little damned Miracle Gro fert pellets, but they can be sorted out.)
(There is no verm in my Semp mixes either.)
I was going to use a cactus soil+grit (coarse sand) casing* like that in the cased grain Semp project.
I believe a large % of that soil is peat based, but if you think just straight peat is a stronger option, I will definitely consider it as a sole casing.
Speaking of my Semp cased rye tray, I thought I'd post a picture of it here as it looks now. I'm having a hard time telling if the white patches and wispy growth is typical Semp mycelial growth or something threatening-- it has no strange smell-- but here you go. Take a look up close and tell me if you think this is typical for something like this.
I looked at the bag tonight, and it is all very well covered up except one corner (pictured). I think I just didn't mix the grain well onto that side, so I have adjusted the bag to take the weight off that section and will let it work in. I'll check it more frequently now that I've noticed it to make sure it's filling in and not buggy/stalled.
*As an aside, I made this soil/grit combo for the Tamp var Galindoi quart that's looking ready to spawn in the next week or so. It's based on the Mycolorado method and his phenomenal Tamp grows)