Korg Poly800/EX800 Users

I know i probably sound stupid by asking these questions, but i am 
thinking about investing $300 in 2 or 3 poly 800s and i want to know 
if it has a glide feature...im big on glide, so i will only get one 
poly in the case that it DOESNT have glide. i also want to know if i 
can get some help on doing a vibrato mod cuz im big on vibrato too...

thanks for taking your time to read my stupid questions.