You can't add the Zydrine as there simply isn't enough room for it to fit. It takes up 400.0 units of volume, and there are only 0.0100000000002 left.

On the 12th day of christmas my corpmates gave to me....
12 cap rechargers,
11 faction missiles,
10 fitted drakes,
9 manticores,
8 cap boosters,
7 purger rigs,
6 scanner probes,
5 BPC -
4 tec 2 ships,
3 cheapy condors,
2 afterburners
and a shiney faction fitted t3
\o/

[20:03:06] Sean Ameta > ah don't kill me!

How much drone could a rep drone rep if a rep drone could rep drones?