If your projector seems
to go forward most of the time, even when you press the reverse
button, it may be that you're not be pressing and holding the
reverse button long enough. Kodak slide projectors are designed
in such a way that you must depress and hold the reverse button
for little while longer than the forward button. If you just tap
the reverse button the machine will always go forward. (This is
true on the remote control too, except for wireless ones).