I take it that if a gobo is installed it will always effect the light displayed (e.g. you cannot get it to switch between straight light (no image) and gobo (image) without installing or removing the gobo slide? What are the gobos made of and is it a simple task to design/make your own?
Yes, the Gobo will always be there to show it's shape till it is removed. The Gobos are typically made of steel taht has been LASER Cut or Acid etched. For this product making a GoBO is a Job for a Gobo Manufacturer.