I have a 1999 montesa 315r and I am not impressed with the front brake performance. I have read some discusions on this website pertaining to getting the 2 pot brake better. I recently saw a '97 315r for sale that had stock forks and a 4 pot brake mounted. When I went to email the owner it was gone and the listing was deleted. What I would like to know is if the 4 pot is a direct bolt on? Will it line up with the disc?