Have you run cards ORTF and DIN from the not-so-ideal location before? Did you like the results, generally? Those configs have a sterephonic recording angle (SRA) of ~±50º. If you liked the ORTF (17cm / 90º) / DIN (20 cm / 90º) results from that less than location, but found they had too much reverberant sound, you might try a config with similar SRA. For example, 30cm / 45º has a similar SRA of ~±50º, but since the included angle is smaller, more of the sound from the music is on-axis, and more of the reverberant sound is off-axis.
(There's a link to the Stereophonic Zoom stickied at the top of the forum, if you want to explore other spreads / angles and their associated SRAs.)