Switching from foam blocks to paper bags for container bracing, any regrets?

We ship industrial pumps and motors out of Sharjah fairly regularly, usually two or three containers a month, and up to now we have been using foam blocks and timber to fill the gaps. It works but the foam is getting expensive and half the time the timber guy shows up late or the pieces are the wrong size and we end up cutting everything on site which is a pain. Someone in our freight forwarding office suggested paper bags that you inflate in the voids instead, said they are quicker and cheaper and take up way less storage space in the warehouse before use. I am intrigued but also skeptical because I have seen loads arrive with crushed cartons and I do not want to be the guy who switched systems and caused damage. Anyone here using kraft paper dunnage for heavy equipment? How do they hold up against something with sharp edges because some of our motors have brackets sticking out that could easily puncture. Also do you need a compressor on site to inflate them or is there a manual option. Would rather hear the downsides before I commit to changing our whole packing process.