Ah, yeah - harvesting your own can be a good deal of labor. I had a ~4 year old tree that had grown to +6 meters tall, and I lost it in an unpredictable, unexpected cold spell. It had gone through freezing temperatures in the past, but usually only a few hours. This freeze lasted 3 days. I lost my larger acacia, and I thought I had lost my smaller one, as well. However, the smaller one, in a 200 liter pot, made a recovery.
So, i decided that i would strip the bark and harvest the tree. Hours later, I had 2 x 5 gallon buckets full of material. Yeah, it's a total pain to do, but I think it will be interesting to see how it yields. (I haven't done an extraction on it, it's just waiting for the right time.)
And yes, it can be difficult to get the large chunks into fine shreds when you're limited to kitchen equipment. If that's as fine as it can get, then just test it.
I've tried brewing chunks vs. extracting chunks, and I, personally, found that brewing the larger pieces first, prior to extraction, produced higher yields per pull, and a general greater total quantity of alkaloids. The brewing process that I used was the 3 x 30 minute simmers. I tried not to let the water ever reach a rolling boil, and I would often utilize an acid to insure that the DMT was in the salt form. It's a lot more stable to heat when it is in the salt form, and soluble in water. So there is a better chance of removing the highest content of alkaloids based on the surface area of the bark.
There are many ways to do it.
Experiment after you have an idea of the basic concepts, and see what works best for the bark material that you are collecting. It may be worth getting a crude extraction of the bark analyzed (via benzyme) to see which alkaloids are present in your trees.
Good luck!
ACY
Sometimes it's good for a change. Other times it isn't.