Thank you bertsmobile1 ...... good to know.
Maybe I should stick with Husqvarna mulching blades?
Be sure to know the difference between "true" mulching blades as those that are simply called mulching blades. For example, true mulching blades are wavy and have a high AND low cutting edge on the face of the blade and have a relatively low lift. This blade design helps to recirculate the grass clippings under the deck and to cut them multiple times before dropping them back down into the turf. These types of blades can be used for side discharge, but the recirculating action is best achieved while using a chute block AND baffles under the deck. Also, a true mulching setup works best when all mowing conditions are ideal; grass is dry, mowing slowly and following the 1/3 rule.
Other mulching blades on the market such as Oregon Gators are medium to high lift blades, have one cutting edge and serrations on the sail. These are NOT made for chute blocks and should only be used while side discharging. Many people will use these with an OCDC but typically only when along landscaping or when processing leaves.
So, if you intend to simply avoid side discharging, purchase the complete Husqvarna mulching kit for your mower and mow often. If you are simply trying to reduce the size of your clippings as they come out of the side discharge chute, try using just a wavy mulching blade or gators to see which one works best for your turf, mowing method deck setup.
I will share with you a bit of my experience. I have a 38" stamped deck on my mower. It came with a mulching kit installed which included the wavy mulching blades and a combination baffle/adjustable chute block. The previous owner of the mower had a well manicured city lot and mower VERY frequently. When I got the mower home this setup did not work so well. I have a mixture of various grasses, dense is some areas, and sparse in others. When I used the mower as set up from the previous owner it worked fine in the sparse areas, but where my turf is dense and tends to grow very quickly, it just kept clumping and would miss some grass from the deck being underloaded. Long story short, my mowing frequency and turf conditions don't allow for use of a mulching setup.
The only advise that I can give you is that if you intend to purchase the Husqvarna mulching kit, be prepared to have somewhat disappointing results IF you are not able to cut often enough to keep the deck from overloading.
Lastly, the discharge chute serves two purposes; it is a safety device which helps to prevent large, heavy objects from being thrown up towards window, children and anything else which might be damaged, while also helping to direct clippings back into the turf. On my rural lot I typically have my chute all the way up to help with the grass to disperse better as my specific type of chute is known to create lines of clippings along-side the deck (poor design). I do not have to worry about kids or the neighbors belongings being damaged so for me this works out okay.
Hopefully this helps you with making a decision as to how you want to set your mower up.