I'm rereading scotts book again. He makes an interesting point ref weather - at one point the martian commander is commenting on how wet the planet is and the effect on his heatrays - cutting the range "in half" during a heavy snow and rain. This would support some of the weather rules I tinkered with, although 'half' is much more severe that I used.
I'd love to post but rules really are not my thing. When playing we often get them wrong or completely forget them . I also tend to get side tracked when trying to read rules books by looking at the pretty pictures
I'll just take your advice with the rules as use them with the changes you all make.
I have had the experience of playing rules with the game designer either on my side or the other side. Several times a rules question would come up and we would query the designer across the table. Several times his response was to the effect of "I'm not certain. Let me try to remember which version did we settled on." Then he would explain that after trying and test-playing 6 different versions of the rule he had a hard time keeping them all straight. So if even the rules designers have trouble keeping the rules straight, I guess there is no shame for the rest of us.