Locking vented cap sounds great. where and how much? Foam to insert in your tank to prevent sloshing up and out can be got at automotive performance shops.I am ordering more than enough to stuff in my tank. No fabrication just stuff it in. easy but it will be costing me Near $20 with shipping. Before I do that though I am checking with some stock car builders to see if I can buy some scraps.Every buck I can save ya know... Besides I get to ride my Mighty Mot0 Mountain trek over there to ask!!!! Another reason to ride!!!!