Id much rather have tarantula outcrossed to some other genetics. MM is always there. You already got the best of MM in the parent flowers, probably mm is the backround of the outcross as well. Why go back and get the bad parts of MM? MM wasn't that spectacular compared to modern roths. Id go back to tarantula just because nothing has come close to it. I have bloomed out multiple Tarantula offspring. It will be a good parent. The best two roths I bloomed last year had tarantula as a parent. I already put a pod on it.