Hi!
TruepointDexter, thumbs up, your build inspired me to actually doing something with my lone last empty mech bay after I sold my unfortunately failed medium lrm platform, the Trebuchet 5N!
So I bought a cheap K, which I immediately sold after unlocking basics, then bought a 7M, and tried your setup.
It was nice, but for my taste, lacked some punch. I experimented with a lot of builds (PPC-s instead of LL-s, MPL-s, SRM 6/4, etc), but my most successful creation is a twist on your build:
Instead of the LL-s, I use 2 Large Pulse Lasers, and only 2 streaks (both in the torso, the Narc tube is fine for SSRM-s anyway).
Endo steel, double heat sinks, full armor except legs which is 47/48 (odd tonnage reasons), XL 300 engine, 5/5 JJ-s, 2 LPL-s (1 in each arm), 11 DHS (1 in the engine), 2x SSRM with 1ton of ammo.
Whent things start to get hot, you switch to chain fire (another weapon group maybe).
With speed tweak, 106kph speed is simply awesome.
Armor placement is personal preference, I put more to the back, but each to his own.
There are enough crit slots for Ferro Fibrous left, but then the tonnage is borked, so I opted out from FF.
If you go FF, you can put 1 more DHS into the engine.
The idea: ECM is still abundant, and now the 6 ML Jenners are making a comeback as well, so the main guns, the lasers have to punch hard and fast, and we need to decrease reliance on streaks a bit, so here comes pulse!
Large pulse laser range is okay even in the 350-450m range, soin this regard it is not a big step down from the Large laser.
A word on XL and Trebuchet: while the Trebuchet might seem underwhelming as a brawler, the XL-s are actually very viable with it, just like in the case of the Catapult chassis (slim side torsoes, and in the Treb, they are hard to hit from the sides)!
Smurfy:
TBT-7M
Blast away!
EDIT: FF remarks.
Edited by Takony, 10 April 2013 - 12:57 PM.