You dont have to with rosin, that's more for if youre using coconut oil made from flower. It isnt as strong as rosin so you need more. Just trying not to confuse people with to many different measurements. 1/4 is 2oz's, and I use 2 tbsp of VG which is 1oz. So it isnt that much more, it doesnt effect taste that much and the more VG or coconut oil the better it mixes. You could make with just rosin but would be harder to mix. Whether I use 1, 2, or 3 tbsp of VG or 1/4 cup of coconut oil I still have 1g of rosin. 1oz more of coconut oil will not make a big difference maybe 1 or 2 more total gummies but will blend much better. I dont believe potency will be affected. I have made both I cant tell other than a small difference in taste, not bad but I can tell. I can only speak for the way I do them. Whichever works best for you is the way you should do it. I do t eat often, just when going out and cant smoke lol.Yeah, I'm not sure why you suggest 1/4 cup per gram of Rosin of Coconut oil? That's a lot. You could do the same amount as the VG and it will mix better and not add a flavor as much as a 1/4 cup would. I decarb my extract in small amounts of Coconut oil often and it mixed well.