Thank you for all your advise Now I have wider vision of possibilities and it should be easier to make next steps, thank you for that. I would probably buy this book now, in fact I searched for it earlier but do not bought it because I thought I can find all the info somewhere else. Making the dome from a single sheet sounds very attractive even if it requiers building an oven, which is another challenge, or finding a company with such oven. Greg's company is in US and transporting 220 kgs dome through the atlantic and half of europe sounds expensive :) But I'll think about it. I dont want to exchange my safety for lowering the budget. But I also dont want to change my design. If I am starting a project so complicated, expensive and long hard work demanding, I want it to be worth it. I want to build a sub for the pleasure of watching outside marine life, wrecks and enviroment. I think that one of the best designs for that purpose is one when two people inside are sitting together side by side, like in a car's two front seats, with a big domed window in front of them. Once again thanks for your words. regards darek ************************************************************************ ************************************************************************ ************************************************************************ The personal submersibles mailing list complies with the US Federal CAN-SPAM Act of 2003. Your email address appears in our database because either you, or someone you know, requested you receive messages from our organization. If you want to be removed from this mailing list simply click on the link below or send a blank email message to: removeme-personal_submersibles@psubs.org Removal of your email address from this mailing list occurs by an automated process and should be complete within five minutes of our server receiving your request. PSUBS.ORG PO Box 53 Weare, NH 03281 603-529-1100 ************************************************************************ ************************************************************************ ************************************************************************