On Jun 29, 9:26*pm, wrote:

Put it back to stock and try to get you Std ATC back.

This is likely an imported sailplane for which an approved type
certificate was never available in the US, so there probably is no
"Std ATC" to get back. For example, all Schleicher ASW-20 in the US
carry Experimental, Racing or Experimental, Exhibition special
airworthiness certificates.

Thanks, Bob K.