Purchased my first sled-1997 MXZ 583 with 3200 miles. Am excited and interested in opinions on the sled including both good and bad characteristics. Would be interested in any maintenance procedures that are important. Will be mainly using for long (100+mile) trail rides. Sled has deep tread and is not spiked. Under what conditions should I consider the need for spiking? Is electronic reverse able to be added to this combo? Thanks for all help.