<html> Brett,     A perfect time for a few Space Blankets from the sporting goods store. Open the lids and secure the blanket(s) tent-like over the pianos, especially the block area. They will still drift when the covers are removed, but that can wait until show time. Also, you can predict the amount of drop somewhat, at about .8 cent per degree F increase. So, for example, if you measure a ten degree difference between covered and uncovered, tune at 442. Close enough for jazz................ Guy Nichols, RPT Ft. Stinkin' Desert, NM (much closer to the sun.....) At 02:50 PM 6/8/2005 +0800, you wrote: <blockquote type=cite class=cite cite>Aloha, Today was a long day! It was the first time to tune two pianos for a concert with them setting out side in the sun right on the ocean. I did a private part on the beach for Niki , but only one piano. And it was under a big shade tree. They left the conservatory at 10 AM . From the AC where they have been at A-440 and tuned to match for teaching side by side . One a Yamaha G-1 the other a Howard C171 . By 11:30 AM they are both set up on the stage . A quick check and the Howard is close a little flat from 6th octave up the Yamaha is about 4 to 5 cents flat through out. So I figure they are both going to drop in the direct sun light lets bring the Howard up in the 6th and 7th octave. Then I went to the Yamaha it has droped even further so I start at A-0 and pull it up to a little above A-440 .  about 3 or 4 cents above A-440 .Now it's close enough to fine tune . By the time I got back to the Howard the 6th and 7th was sharp the sun was no longer shining directly on that part of the piano . I decide after a quick check of the rest of the piano I can fine tune without correcting pitch first in the 6th and 7th octave . Ok done lets check out the Yamaha . WOW the sun is shining right on the pin block the 5th and 6th octive is flat. Pins that were acceptable at noon now feel very loose . It's now about 2pm sound check is at 3:30 I notice that the sun is not even shining on the Howard like it was and the cool trade winds are picking up about this time. So you know whats going on with it. I retune the Yamaha 5th  6th & 7th.octaves and start to recheck the bass octaves the tenor is sharp !!!! corrected because they are running late for sound check it's 3:40 PM  Oh ya I forgot to tell you about the leaf blower guy and the sound check guy working around me all afternoon ! Ok here comes the performers .First thing they want to do move the pianos . Guess what they play Rock and Jazz . Thank God . They are happy , I'm not so I stay after they leave and work the pianos for another 30 or 40 min. as the sun drops behind the palms. What a long day . Brett Glass A Sharp Piano Service Maui   -- ___________________________________________________________ Sign-up for Ads Free at Mail.com <a href="http://mail01.mail.com/scripts/payment/adtracking.cgi?bannercode=adsfreejump01">http://www.mail.com/?sr=signup</a> </blockquote></html>