GH Couple of C19 plots among C18 majority

Chia Farming & Harvesting
1

I am farming couple of thousands of GH C18 plots with GTX 1070 8GB, but some of my hard drives miss around 1GB to fit one last additional plot.

How much would it hurt farming performance if I put on each of those hard drives (<20) one C19 plot, to utilize space left there?

2

Adding 20 gh c19 would be like adding twice as many c18 (well, 2.5 x) You can see from the gh github

3

Clear!
So not every re-compute would be more complex, but only the ones affecting those specific C19 plots?