[pvanroy]

One more thing to add: a test report of the V54 (W.Nr 15708) by Beauvais, dated 22.12.43, states the following:

"... Das Seitenleitwerk ist für eine Serie nicht ausreichend. Jedoch kann man den Bau von 6 Aufklärern mit diesem Leitwerk verantworten..."

Further, Wendel's test report regarding his flights with the Guyancourt machine (W.Nr. 110073) on 5 and 6 April 1944 starts by saying:

"Am 5. und 6. April 1944 habe ich in Guyancourt die erste dort montierte Me 109 H eingeflogen..."

Both quotes indicate there were plans to convert more (up to six, apparently) airframes to H standard at Guyancourt. However, from the information provided by Nick Beale, it seems in the end only W.Nr. 110073 was actually converted.