Hello, first post here - searched but did not see anything specific enough. I am considering replacing the stock OT in my 40 watt HRDX with a Hammond. (I like the cost a bit more than MM). I have narrowed it down to the 1650H or 1650HA - both are 40 watts and rated for 2 6L6GC's. Anyone used these and have an opinion on the tonal improvement? Also, looks like I will have to drill a couple new holes due to mounting size, any other changes I need to consider (impedance matching, new tap config, etc)? I am new to the OT idea but it seems straight forward. Any input is appreciated. Also, note I am using JJ's power tubes and all Mullards in preamp, amp has also been modded by a pro and is much improved - this my last step. Thanks!