I would highly recommend doing a tad higher doses for a shorter duration. 14 - 16 weeks max. Just do test @ 500mg/wk & tren @ 350-400mg/wk for shorter, it will be much better.

Trust me man, staying on tren for 20 weeks is going to blow. It's like punishment after the 8th week for myself.

In any case, add some HCG in @ 250iu x 2/wk for the cycle.

Good luck...

-VM