I used to make enough paste to fill the bait gun and that's it. So instead of doing 6eggs or in your case 10eggs at once , I did say 2 eggs at a time. Don't get me wrong, I would blitz say 30 eggs at a time, add liquids etc and I worked out that 150ml of the egg mix plus base mix would fill the gun perfectly. It meant I did say 12 mixes instead of 5 but I had no paste sitting and therefore drying out/ stiffening up. .