W.J. (Bill) Dean (U.K.). wrote:
"RP26. The fitting of systems that warn the pilot of a glider that the
undercarriage is not lowered during the landing approach IS NOT RECOMMENDED.
This is because if such a system is fitted and is activated then the pilot
is likely to attempt to lower the undercarriage during the final stages of
landing. This could result in mishandling the aircraft, so causing an
accident.

You guys don't routinely do a test opening of the spoilers on pattern
entry?