and FYI, you might think you able save some money, but you if you taking the account of the time making this, beta 1, beta 2, version 1, version 2 etc, plus all the material wasted, you will spend more in the end.
last time we used to DIY a lot photography stuffs, as there is no such things available commercially, nowadays there are many designs and products available, DIYing is no longer best option
Thanks for the reply! You have a good point. Which quick/rapid strap would you recommend for a mirrorless camera? I am looking at the Blackrapid SnapR but the reviews are mixed. Qoo10 has a "F1" strap which looks suitable, but not sure how good it is.