So I had a look around at various sites last night, getting a feel about tensioners and the like. Appears that they can be categorised, broadly, into two main categories - namely those that attach at the back - and those that are connected near to/on the BB. Of those at the back, they either - a.)dial/slot/screw only into/onto the existing hanger; or b.)as above AND are attached/connected to the QR skewer slot as well (like the one I have). With this being said - and based purely on my reading of various review placed up by cyclists over several years, on various sites - the following becomes apparent: 1.) Irrespective of the make or model, home-made/modified or bought new - almost all of them have users reporting issues pertaining to "loss of tension"... 2.) The above applies irrespective of whether the pulley/tensioner pushes up or down on the chain. 3.) Many comments are made regarding "having to re-tighten the bolt" - with these being spread out over those who occasionally do it whilst routinely cleaning the bike at home, or those who have to make adjustments whilst on the bike/trail. In short [], it appears that whilst there are obviously those that are fortunate in having no problems - there are plenty of SS riders who have issues with tensioners... Many of the replies to above, suggested the user check chain alignment and setup issues (as per the instructions of the specific tensioner)... However, there are those who record being 100% certain that all is as it should be, and it taking experimenting with 2/3 models before finding one that worked for them... Given that the magic ratio (thereby negating the need for a tensioner) apparently works a treat until your chain eventually starts stretching [] - for those who do not have the option of horizontal dropouts - the tensioner is a unavoidable part of the setup... I have now learnt that I should probably have gone for something like the Surly Singulator (or similar), as it being an example of a.) above, would not have interfered with my skewer... With this being said - the Surly also comes standard with a tension spring - whereas my current tensioner relies on its adjustment bolt 'staying put', as it were.... I will therefore try my hand at modifying what I have, and will look a-fresh as building my own from an old rear mech I have lying at home. Suffice it to say - if you're converting to a SS - put some thought into what tensioner you are going to purchase, since once the conversion is done, it remains the only part that could require continued 'adjustment-input' going forward - and if this can be avoided by choosing the right tensioner, then by all means, try and do so!