No need for Evolva parts. You can drill holes in the stock shock tower. Note that the new holes we are using are 10mm above where the tower mounts to the bulkhead. Doing this requires a spacer (we used a 3mm nut) behind the plastic shock mount, and taking a little material off the edge of the tower to allow the shock to pivot freely. We asked the manufacturer to add this to future releases of the XR/8.
