Cycle extension Question

I am 30yrs old 5'11" @202lb.s and have worked out for 8 years.

Currently I am in my 5th week of a 12 week cycle which consists of: 400mg/week of Test E
Nolva/ed
l-dex on hand
I have my PCT on hand.

My question is can I extend this cycle out another 5-6 weeks by picking up another 10mg's? Can I bump it up to 500mg/week for those last weeks? I know there would be nothing wrong with extending the cycle, but my questions are:

-As a first cycle should I just concentrate on getting all I can out of a 12 week cycle instead of lengthening it?
-Is there any benefit to uping to 500mg/week?

400mg to 500mg no big deal at this point. stop the cycle at 12 weeks do you pct. then start to plane you next one

Thanks, that is where my delema was since I am only in my 5th week and have seen strength gains but no real weight gain. I think you are right concentrate on diet and finish strong. Plan next cycle with what I have learned during this one.

weight gain will come in the next few weeks.