fermenting in a firkin?

Has anyone considered converting a firkin to ball lock connections? I am working up to do some under pressure fermentations. I have a spunding setup for a corny and will probably run a pilot cider batch to see how well it works.

I don't know if the parts are even out there to make a bung/ball lock converter. But there are 12G firkins out there that would be a perfect next step up for the brewery in my shed. Maybe I don't need ball-lock parts, but I'd like to at least be able to hook up to a spare corny for purging/harvesting co2.

Is anyone fermenting in a firkin that could point me to the parts I would need to minimize disposable parts and hammering/messes?

 

I may work my way up to a firkin, but I guess I am going 15.5 sankey for now since it'll save me 100$. I am still trying to figure out if I can pull of a primary in a sankey without clogging up the dip tubes. I am just getting used to the idea of dumping all the trub into the carboy and then dry hopping once the FG is apparent. Maybe I should stick to the carboys and then "bright" and maybe serve from the sankey. Ugg, growing pains because I am resolving one bottleneck at a time without thinking ahead. Right now I have a 6 and two 3 glass carboys, but I'd really like to get the capacity/pipeline up some.