Yes, translating the problems is still the hardest part. Once you can write down the MIP, it's just syntax to get it into any old solver. It took me two - three days to write the I/O to get data in, formatted properly, and so on, and about half a day to write the MILP to solve ship-design optimization in Highfleet.

https://github.com/jodavaho/highfleet-ship-opt