time wise perhaps, but efficiency wise you'd have to make it less efficient material wise.
Edit: P.s. since and MFSU require 10 diamonds, if it awarded 20 scraps then it would also appease the masses that are begging and pleading for a recycler that takes into consideration of the rarity of the materials.
I rather send a nuke their way than "appeasing the massses". No scrap will be made, or only a chance similar to the recycler to produce the scrap, per slot. (Ergo no more than 9 scrap will be made)