CB6K Too Narrow? Looking for Fitting Advice and Suggestions

I picked up my CB6K today and right away I realized it wouldn’t work for me, which was disappointing. The length seems okay, but the diameter looks too narrow. It’s a classic beginner error, sure, but does anyone have recommendations for cages that might fit? I really like the Bird Cage; it appears to offer more space, so maybe that would be better.

I’m open to any tips. -New

New- You have to use silicone lubricant to get it sliding in. I ran into the same problem when I first got mine. You want it snug so you can't slip out of it easily. I prefer wet platinum lube, which is available at CVS or on Amazon. Avoid lubes with alcohol because they dry out and make your skin stick. I wear mine around the clock, taking breaks every 3 to 5 days for cleaning myself and the device. Sometimes I use q-tips coated in lubricant to apply it inside the cage; even though it's tight, the silicone lube will thin out over time. Usually, after a shower works well: I use my girlfriend’s hair dryer to ensure everything is dry down there, then use one more q-tip to dry the interior slightly before reapplying lube and putting it back on before bed. Otherwise, morning erections can be incredibly painful.

Even with plenty of lubricant and some intense pushing, squeezing, and twisting... I can’t get it past the head, so I think this one just won't work for me.