With solids, we can't count on out entire customer base to understand lashing valves, and that rockers may need backed off over winter, etc... With hydraulics we don't have that issue.
With some 800+ NA HP engines in our fleet, and even some "power adder" engines maxing over 1400HP with boost, we simply still don't see lifter failures.
thats my quick and dirty answer as to why we don't offer solids at this time.
