Tire wear may drop you below the minimum. Fyi
1305g for me, long pack, S-grips, TCS 'legal'. lol
I weigh my car every race, tire wear hasn't seemed to have effected the weight,
I do occassionaly add a single body clip under the body if I am worried ..that usually bumps me up a tad.
I ran a full size pack because I was short on time to make shorty fit, with my m05 I was a lot faster with the shorty pack so will switch for next week.
I definitely prefer the shorty pack, the weight is closer to the centerline of the chassis and running a shorty will usually make you under weight, which allows you to place the weight needed (to get back up to spec') in strategic locations.
My M05 with tricks was down to 1340 I think so pretty big difference
1340 ...I'd lose 35grams, it WILL make a difference (unless your not racing it, then doesn't matter and you won't notice).