RE: Excalibur magtip
Joey, no pictures are needed. Do the limb tips have a molded plastic end or can you see fiber glass carved to accept the stings? If you've just put on the string then shoot it and the string will stretch after ten or twenty shots. One inch is the lowest brace height. You should want a bit more than an inch. Maybe an 1 1/4 to 1 1/2" or so.
If in doubt why don't you post a pic of your limbs?