If this comes across as know it all, apologies.
I once tried HFW recipe. Its ok if you are going to smoke and hang the meat for a year then cut it with a penknife and chew on it for hours.
If you have not already put your meat in the brine, (or if you have and can bear to take it out, throw away the original, soak meat for 24 hours in regularly changed water and begin again,) the solution I use is
To each litre of water :
140 grammes salt
60 grammes sugar
Optional:
10 aprox. peppercorns
" " juniper berries
" " cloves
I would leave bellies in for 3 to 4 days minimum on this cure. Very important to keep the brine at 4 deg. C (ideally in a fridge) make sure the meat is totally covered at all times. I use plastic bottles of frozen water on top of a plastic cutting board to keep the meat down in the water. When cure completed, rinse well, pat dry and leave in fridge allowing the air to circulate around meat as much as pos. for about 2 days. I dont know the science of this but it works.