Welcome to the forums. I am glad to see there is still an interest in MLC for the 83. I wouldn't say it is really hard, I am gonna say I just dont have the time as I did when this project was thought up years ago.
The only thing I have had difficulty with was searching the vat, and I have been doing coding in z80 for a good chunk of time. However that problem has been fixed for sometime now, I am just looking to sit down for a good weekend and just pound a bunch of stuff out. Another issue is that I am going straight into the app, while a lot of the code is easily to transferable between the 86 and the 83, some of that same code will totally screw up when run as an app.
It will take some time, and I know I have been slacking...I will update everybody once I get something that is playable. Screenshots are good, and I could show you guys the shell, because quite frankly that is almost 100% done, but I said I wouldn't do anything until I got something that I can really show off. All I have to say is soon....