The 3-shot safety is annoying in mil-sim. Mil-sim markers don't have the large, sensitive, tuned triggers most speedball markers do. I can walk my trigger faster than most field's max RoF, so even on semi, I kick right into 15 BPS with my Ego or Demon. I can't do that on my Phenom, so I had it reprogrammed to get rid of the safety shots.
That said, I've been playing a long time, and in that time I've developed good trigger control. Lots of people out there don't have that, and I've been lit up pretty spectacularly by new players on full auto with no safety shots (again, talking mil-sim and mil-rec here). So, for what it's worth, my advice is to live with the safety shots until you have that trigger control. Once you're comfortable that you do, see if there is an after-market board or mod that will reprogram the board to get rid of them. With the Phenom, there is the X-Board mod. I don't know if there is an equivalent for the BT markers.
NxE and PE pants size small. That is, their 2XL is about a Valken XL (maybe a little larger). For truly "Ogre" sized pants (3XL-5XL), I've had nothing but success with Valken.
Now, it is true that Valken does have some quality control issues with some of their products BUT their soft good seem to experience it less. I have a pair of Sierra pants and a pair of Crusade pants, and both have held up very, very well, with no quality issues. Their jerseys as well.
So, in my own personal opinion, for 3XL-5XL clothing, Valken is it. And the end of the day, if it fits and you like it, buy it...
Don't let size or age deter you from playing man. It's a Hell of a lot of fun, play to the level you are comfortable with, try to improve, and just enjoy yourself.
I'm almost 43, 300 lbs, and I sport a pair of knees ruined from years of rugby and a bad shoulder. I play on a milsim team, a small speedball team that is a feeder for a CXBL team and the Citrus Connection. If a fat, half-crippled, middle-aged guy can pull it off, son, you're golden...
I like Valken for their XXXX...XL sizes, and we recently got some sweet jerseys from HK that had Ogre sizes. Also Animal has the big boy sizes too.