I usually do ed injections, but have friends who have done just fine on eod fina injections.
As far as limiting tren use to 4 or 6 weeks, or some other random number, I fail to see the point. There is ZERO evidence that tren is liver or kidney toxic. I've had a liver enzeme tests run 12 weeks into a test/tren cycle (tren at 100 mg/day) with results in the normal range. On the other hand I have used 40 mg of oral winny a day, and after 4 weeks my liver values were high enough that my doctor advised me to stop immediately.
If one considers how effective trenbolone is, and that anything less than a 12 week cycle is not going to change your set points, it seems wasteful to use it for only 6 weeks. I'd do the cycle like this:
dbol 20 mg/day wks 1-4
test enathate 400-600 mg wks 1-12
tren 75-100 mg/day wks 1-12
liquidex .5 mg eod add the way through plus post cycle
just my $.02