I have heard this before and I think there is a misconception when it comes to when or why to use a deployment bag. There is no minimum size or complexity as to when you would or would not use a deployment bag. It is simply a choice. I use them regularly and if they are used as designed they do a good job of ensuring a reliable deployment. If you are a FruityChute user then just talk to Gene and ask him his opinion. Having said that, the smallest airframe I have used them in is a 3", but if they were a viable option for a smaller airframe I would use one without hesitation.