I can't add much other than my limited experience. I've only made one set of carts using 2 decarb methods and they were successful so I can recount what I did based on my research. I'm sure this cat can be skinned many ways so my process is far from the only or the best. Just what I did.
Hash rosin is supposed to be the best due to its 'purity' with less veg matter. Lower micron bags are correspondingly better as they further reduce veg matter/impurities. If you are going to the considerable hassle of making bubble I would get the correct mesh bags. I used 25 Micron with live hash rosin. Supposedly the best for terps retention. But I would be happy to use dried flower as you plan to.
Once you have the bh you need to decarb. I've used 2 methods, the low and slow in oven in small glass pot for multiple hours. Can't remember the details as I now prefer using a decarb puck. I bought this and have been impressed :
Use the Decarboxylator with a heat press machine whose plate size is larger than 2.5''*2.5''. Pair with any 7ML food grade silicone jar size 1.5'' in diameter and 0.8'' in tall. The decarboxylator is made of 6061 aluminum. Package including 4 silicone containers.
www.mogobe.co
More expensive options are also available.....
Takes 20mins between your plates plus a few hours cool down. Much easier than in the oven and I found the results the same (in my limited experience).
Fill prewarmed carts with glass syringe etc and job done.
Cart selection is important. I used ccell with 2mm and 1.5 mm output holes but they have developed some with 2.5 designed specifically for decarbed rosin so I'm going to buy some of these next time. The 2mm are better than the 1.5 I've used. Less effort to draw and less clogging.
It is also suggested to use 0.5ml carts as it seems they will eventually clog up and the 1ml tends to waste product. I don't plan to reuse carts. Not worth the risk to the product.
Here are the carts I plan to buy next run:
CCELL TH2 Oil Cartridge series(TH210,TH205,TH203) is the symbol of precise leakproofness and luxury user experience. Glass is adopted as housing material to ensure better anticorrosion property and better flowability of oil.
www.weareccellsupplies.com
Other carts are of course available. In EU I have access to a smaller selection.
I found this guide really helpful:
www.reddit.com
Good luck. Let us know how you get on and any tricks you pick up.