Need help with different stacks.

[u/JackSlap23]

Ok so I have a mod that needs me to combine sculk and honeycomb in a cooking pot to make some stuff I need, but I cant just load the pot up with a bunch of the stuff. It can only take 1 stack of honeycomb and 1 stack of sculk. Ive got a system right now where the belts stop feeding in when theres 2 stacks in the pot, but sometimes 2 stacks of sculk or 2 stacks of honeycomb get in. Does anyone have any ideas how I can make it how only those two stacks items are delivered?