My 54pin plug is not a BIT II plug.

From what I have read in the links above and the sticky retrofit guide, I think it is compatible without mods, although I'm not 100% as it doesn't exactly match some of the other posts.

Here are the pins
1 yellow
3 yellow
5 black
6 yellow
9 red
10 brown/white
11 white
15 white/grey/yellow
17 red/yellow
18 red/yellow

19 black
21 black
22 blue/brown
29 green
30 black
32 red/yellow
33 white/green
34 red
35 violet/white
36 black/brown

37 black/white
38 black/brown
39 brown
46 white
47 black/brown
48 black/white
51 white/brown
52 grey/red
54 brown/black

Is that ok?
Many thanks