(FT) UIM and DERFACs

I'm working on a set of rules for "SFBing FT" (without all the rules problems,
mostly for making SSDs) and someone mentioned that I forgot about the Ubitron
Interface Module and D.E.R.F.A.C.S. (some acronym about improved disruptor
range and hit chance). These are for Klingon ships, but "other races"
experimented with similar systems but never installed them. SFB explains UIM
as some sort of focusing crystal or matrix that burns out easily, the Klingons
used
them to improve disruptor and their low-powered phaser
damage potential to compete with the Fed's photon torpedo and stronger
phasers.

Here's ideas I want to bounce off your heads:

UIM: +1 to hit for ranges up to 30, but weapon automatically is
damaged and fixable. Only for pulse torpedoes and B2s & B3s (may want to use
only for pulse torps). Use is optional at time of firing. No change to cost.
Alternatively, if any die to determine a hit is a 1 then the weapon is damaged
and fixable. The cost multiple is increased by 1. Or, should this have no
damaging effect on the weapon?

DERFACS: extends the range of pulse torpedoes to 36, chance to
hit from 30-36 is 6.
I don't know if I want to make it a separate fire-control-like icon that
can be damaged or increase the cost of the pulse torpedo. Increasing
the cost is probably easier, say +1 to the multiple, although I think
this is too costly for a small increase in range?
Increase the mass by 1 (becomes 5 + 1 per arc)?

So, a pulse torpedo with both UIM and DERFACS can be a deadly weapon (at least
in the hands of someone who doesn't roll lots of 1s). So, if using the cost
increase options, it would cost mass x 5. Too much? Not enough?

Glen

As an old ex-SFBer, I actually think that I can comment here...

> UIM: +1 to hit for ranges up to 30, but weapon automatically is

I'd say to go with the "damaged on a 1" idea. It fits the spirit of the SFB
system most accurately.

> DERFACS: extends the range of pulse torpedoes to 36, chance to

I'd say "yes" to the dedicated fire control, which would also be damaged on a
roll of a 1.