you could encourage multiple top cola's just by LST'ing and not lose the down time. I don't FIM because of recovery time. I'm not an expert but I have damaged many plants and any time I have cut anything, the plant took about 2-3 days to resume its previous vigor.
Hence my recommendation for LST'ing, simply tip the plant and let the hormones do the rest. No matter which technique you use, your manipulating the growth hormones.