You will have to wait almost the same amount of time with Ergopharm that you do for BioTest, several days.
If you want to start today and still have some fina pellets left, get some plogel and an empty 2 oz dropper bottle. Fill up the dropper bottle with water and remove the water with the dropper, counting how many droppers full the bottle holds. If it holds 40 droppers full, get the desired number of fina pellets (if you want 20 mg tren per dropper full, use 800 mg fina), crush them up, and cook them in a coffee mug at about 500 degrees for at least 10 minutes or until there are brown globules in the water, with the water being clear in color (not brown).
while still hot run it through a coffee filter and let cool. Pour it into the dropper bottle. For an application put a dropper full into the palm of your hand. Mix some plogel with it using your finger, then apply to skin. You will get an absorbtion rate of about 70-80% so don't use too much, thinking it won't absorb.