Those look very similar to the stock design, where the bearing case for the rollers can split apart and shat them out.
The comp cams and BTR kits have larger, stepped trunions and snap ring retainers on the ends to prevent that from happening. Those kits can be had for ~$120. Ive assembled over 40 sets of them and never had any problems.
Ive never tried the bushing kits, but I know straub makes the same thing as strano for about $160 vs $200.
http://www.ws6project.com/user_stor/...oducts_id=8252