I took a look on KLOV for Gaulent Lenends
http://www.klov.com/game_detail.php?game_id=7926
KLOV list monitor as Medium Resolution Monitor.
How is you monitor hooked up to NAOMI in the Gaunlet Cabinet?
Not positive, but I think the NAOMI conversion for a shooter will also need a 15KHz or 31KHz monitor.
(or maybe not because KLOV lists CM and HODT2 as Medium Resolution also :smt017. )
Do you know what type of monitor is in you Gauntlet Cabinet?
Also, as englishman_in_plantcity mentioned, the angle on the monitor for that cabinet looks like it has quite a pitch for a shooter.
Also, is your SEGA I/O a JAMMA converter in you Gauntlet Cabinet?
(If so I think you need JVS I/O and not JAMMA interface)
Not trying to discourage your conversion but I you can grab a gutted MAZE, HODT2, or CM cabinet might be a better place to start.
Also, for all of the price and the work might be easier just to buy a HODT2, CM, or MAZE (working or project) and start from there.
The main reasons I am doing conversion is
1) I really like the look of the NAOMI universal cabs
2) It is darn near impossible for me to get a woody up to my 3rd floor
(Although I did get a 700lb Daytona 2 Sit Down up there by taking it apart into about 20 peices, not so easy to take a woody apart)
Good Luck with however you proceed. Will try to help where I can.
(Wish me luck w/ my conversion also)
Bob Presutti