OK.... I've been researching required cleaning equipment for the 457 Varmint MTR I have on order. Zeroed in on using a possum hollow bore guide (#92) for 22LR and a Dewey coated rod. Would like to take a "poll" here as to whether I should get a .17 or .20 cal rod (????). Plan on using a .20 cal jag most of the time might use a .22 cal short brush with 8-32 adapter. Concerned with potential rod scraping ejector and also rod flex (especially with the .17 cal). Would appreciate the experience of other CZ owners.... thanks