ST=>SJ Why?

Just a question concerning the ST->SJ conversions.  I'm always of the
opinion "do what you will and have fun in the game" but this desire to use
SJ rules for ST puzzles me.  I'm a big fan of both,  but they seem simply
too far apart,  conversions seem to strike a discordent note in the flavor
of both milieus.  I've always felt AD&D worked best with a Rennaisance or
lower tech level,  ST is about as far from that as it goes.  And the
"magic" of AD&D clashes strongly with Trek (psionics fit well, however,  I
think).  Isn't there already an RPG  system devoted to Strar Trek? (by
FASA,  I think?).  I know I played in such a system about 5 years ago,  but
the gamemaster wasn't very good so things collapsed.  seems like converting
Traveller or another such system would work better than AD&D.  I know I use
AD&D for Swords and Sorcery,  Storyteller for modern (fantasy,  horror,  or
even straight),  Space 1889 for 17th-early 20th century stuff,  and Star
Wars or Traveller for Science fantasy or Science Fiction.

I guess my question is,  do you do the conversion because you didn't know
there were Star Trek RPGs or do you dislike those systems for some reason?
And why did you choose Spelljammer?

        Also,  I've found few literary works outside the Spelljammer novels
(and the Eternal Wanderer stories,  which are well written but a little too
high powered for my tastes) which seem similar in flavor to SJ.  Just about
any nautical story has elements,  but nothing with a real "magical vessel
in a fantasy milieu traversing different worlds"  Perhaps some of Michael
Moorcocks work.  Anyone else know of anything?

Again,  this is not a slam,  just curious.  If you folks are enjoying
ST->SJ games,  great,  I'm happy for you.

"We look on the same stars,  the sky is common,  the same world surrounds
us.  What difference does it make by what pains each seeks the truth?  We
can not attain to so great a secret by one road..."
Symmachus,  "Memorial on the Occasion of the Removal of the Altar of
Victory from the Senate House" (392 AD)

westermeyer.3@???.edu
Paul William Westermeyer