Spotmeter - which one to buy?

Hi all, recently i managed to make my own battery pack for Pentax 6x7. Thanks for help from list, and good web resources. Im going very soon to do some walks and climbs in Italian/Swiss Alps, and i seriously consider to give a chance to 6x7. Then i need some external meter. I can gen one from

Re: Pentax 6x7 and loooong exposures

Thanks, this link, and the external battery pack are the right options. http://www.sciencecenter.net/hutech/pentax/use.htm I think, i will leave 6x7 and K100D at home during Easter holidays, and use 645 :) Long exposures (with AA rechargeables) and full metering support without any problems.