If you currently use the cask spear system, you can save a small fortune.
The stillage leaves only approx 1/2 pint in the cask, spears leave at least 3 pints
If you sell only 18 galls of ale a week at the price of £2.50 per pint, you will save £12.50. Multiply that by the number of casks you sell, and you will save a fortune over a year. This is a conservative estimate