I picked up a new saddlebag for my bike after seeing it pretty highly recommended and needing a replacement multitool (topeak elementa gearbag). This left me with my old topeak aero wedge still in decent condition and me wanting to make use of it. I wondered if attaching below my top tube bag as pictured could be a handy spot to keep soem of the bulkier spare bits (inner tube seems like the immediate thing I'd keep in there) without haivng much impact on my drag etc.
For context I'm a fairly beginner-level triathlete. Doing my first half ironman in June and aiming for around 22-24km/hr average cycling speed. It could be that I just keep this bag on for my longer training rides for convinience too and then remove it for the race where I can keep a couple of extra gels on my race belt and not bother with the inner tube.