Hi all. New member here. I recently bought a "homemade/kit" bandsaw with 18 inch wheels and was wondering if the urethane belts are worth the expense. My top belt seems ok but the bottom one looks as if it might split at any time so was also wondering if I can replace 1 at a time or do I have to replace both at same time? Since they go for around $32 each was hoping for a one-at-a-timer. This is my first bandsaw and it works great, Got it out of Iwanna for $200 so I am very happy.