I had a Gen-X before switching to the SpeedMerchant Rev.5, and a few guys at my track have the 12r5, so are a few plus and minuses of each:
Gen-X
- Plastic side links
- Aluminum ball studs for side links
- Brass set screw in Aluminum Steering Block for King Pin
- Aluminum Steering blocks not very durable, bend and strip
- pivot balls bend
+ Carbon Fiber is top quality and cut very clean
+ Bulkheads are strong and true
+ good support and optional parts direct from CRC
12R5
- motor bulkhead weak aluminum, bends easily
- aluminum front suspension parts bend easily
- damper shock pain can be a PITA
- Metric screws - no aluminum screws kits available yet
+ good parts support
+ low cost