DIY propshaft?

[HandyAndy]

as most of you know i,m building on a tight budget so would like to ask your opinion on whether i should or should not fabricate my own propshaft for my Roadster from the donor propshaft?

it looks fairly easy to do but am i being too tight to buy one or is it not safe to fabricate one from the donor parts i have?

£100 approx for a new propshaft compared to £0 for a diy one, the money i could save would pay for other parts i still need but if its a safety issue then i,ll accept that ,

so your opinions/advice is welcomed & sought.

thanks
andy