HOME MADE COOKED DIET

hi, I've got a cat that was raised on EVO dry and I tried EVERY trick imaginable to get him onto can food after a FLUTD diagnosis.
finally had to resort to a home made diet of cooked pork loin.
I am trying to get a balance of supplements to the ingredients. and I would like your thoughts on the recipe.

I use a 1kg. pork loin(no bones)
cooked slowly in a slow cooker with lots of water....afterwards add enough unflavored gelatin to make a thick broth. Add pureed vegtables abt 1/4 cup for constipation issues.
Add 2 teas egg shell powder(home made) for Calcium. should equal 3600mg calcium
Add 4 egg yolks to equal 70IU of Vit. D plus another 300 IU crushed tablet to total 400IU's
also beginning to add 2.5 teas. DULSE for trace minerals.
than I grind it all together, keeping about 6oz in the fridge to serve within 3 days
the rest I freeze in individual jars and take out one at a time for enough to feed within 3 days.
when thawed ONLY than do I add
250mg taurine per 4oz dish
100 IU Vit. E per 4 oz.
and I have been giving 1ml. of fish oil by syringe (won't eat in the food)

I think he should also be getting B vitamins. how much would you recommend?
And can you give me your thoughts on this recipe. Is he getting a balance of nutrients?

thank you