Your modifiers are correct -- but I'm not sure why it isn't changing the DRat appropriately... :?:

i.e., going from normal to strong should increase the DRat by 50%, but you have it going from 62.4 to 78.6 or an increase of only 26%...

Uh... yeah. I knew that. I was just seeing if YOU knew why it was coming up wrong.

Yeah, that's it.

As well you should.

More people should take my word as Gospel. It would save a lot of time.

But in this case, I had failed to see what effect the additive equipment would have on the DRat -- so if anyone was "wrong" it was me. Your approach seems sound; but I would wait until playtesting results before passing final judgment.

out of intrest japridemor, have you made a spreadsheet that uses your various mods? they seem very intresting esp. the range of ship designs that you can make.

Tachyon Detection and Ranging ( X )

The tachyon detection & ranging (TDAR) system uses faster-than-light particles to fix a target's position far more accurately than traditional starship sensors. During the End Phase of each turn, a ship equipped with TDAR ( X ) can make a single roll against one enemy starship to which the acting ship has line of sight (TDAR cannot be used on fighters); on a roll of 7 - X or higher, a lock has been achieved.

TDAR ( X )    Lock-on    SU Cost    ORat    DRat
1        6+    2%    -    x1.2
2        5+    5%    -    x1.5
3        4+    10%    -    x2.0
4        3+    20%    -    x3.0
5        2+    50%    -    x6.0

SU Cost: + (10 x ( 6 / ( 6 – X ) – 1 )%
ORat: -
DRat: x (6 / ( 6 – X ))
Hit?: Yes

Note: The current Tachyon Detection and Ranging system is equivalent to Tachyon Detection and Ranging (2) which gives:

SU Cost: + (10 x ( 6 / ( 6 – 2 ) – 1 )% or +5%
ORat: -
Drat: x (6 / ( 6 – 2)) or x1.5
Hit?: Yes

This is consistent with the current rules.

Many starship designers, not content to rely on friendly fighters to protect their starships from enemy fighters, have chosen to equip their designs with anti-fighter batteries ( AFB ), tiny weapons which can only attack at extremely close quarters.

Whenever a fighter flight attacks a starship equipped with AFB ( X ), it loses a fighter on a roll of X or less, just as if it were attacking another fighter flight..

SU Cost: + (10 x ( 6 / ( 5 – X ) – 1 )%
ORat: -
Drat: x (6 / ( 6 – X ))
Hit?: No

Note: The current Anti-Fighter Batteries is equivalent to Anti-Fighter Batteries (1) which gives:

SU Cost: + (10 x ( 6 / ( 5 – 1 ) – 1 )% or +5%
ORat: -
Drat: x (6 / ( 6 – 1 )) or x1.2
Hit?: No

This is consistent with the current rules.

It is interesting to see the ideas though...:)