Hi harem..... mate from Oz.
Try this. It's based on my Rectoverb:
Place an OD in front. I use a MI Audio Blues Pro (but I constantly change/experiment with pedals) so I'll use this as an example. Turn up the gain on the pedal between 11~1oclock. Turn the Volume/Level on pedal down around 10oclock. Tone to taste but around 10~11oclock. Turn gain on amp 10oclock, treble around 9~9.30oclock, mid around 10~10.30oclock and bass around 10oclock. Add an EQ in loop and boost mids a little and top end for some presence. Also, play with the tone control on your guitar; seems to be a lost art. AS for the suggested settings, use them as a starting point. Your amp, guitar, speaker/s and so on are different to mine so make adjustments where necessary.
Many push the front end with an OD as a 'clean' boost; gain at zero, Volume/Level at max. This still tends to give the aggressive 'recto' tone. My suggestion to turn the gain up and level down on the pedal is to smooth out the tone. With the gain up on the pedal, it seems to also reduce some of the fizz. I've experimented doing it this way and it works well. There seems to be a relationship between the amps gain, the pedals gain and the pedals level control. There seems to be a 'fine line' between these 3 dials; smoother or more agressive tone. What I tend to do is find a balance between the recto tone and the smoother tone. It's a balancing act.
These are my findings with the setup as I've explained:
-if you turn up the pedals level, you'll push the front end more and you'll introduce a more aggressive recto tone
-if you turn up the amps gain, you'll introduce a more aggressive recto tone
-If you turn up the gain on the pedal, you'll probably get too much feedback.
As for the mids dialled back on the amp, if it's set too high the attack is quick, whereas if it's lower, the attack is smoother. This affects the 'feel' of the amp. The reduced treble on the amp is an attempt to reduce fizzies as well. The EQ in the loop tries to address the mid range and treble content after the fact (pedal and EQ settings on amp).
Keep in mind this is for lead/solo suggestions. It'll be a slightly 'darker' tone and smoother but with proper EQ'ing, it should sound good.
Another thing I do is to place an EQ after any OD's. I find that OD's tend to be a bit dull or flat sounding. I address this with an EQ. I also cascade two OD pedals. I've used an MI Audio Blues Pro into a Wampler Pinnacle and it sounds very good. Currently, my favourite is an original Marshall Drive Master and the Wampler Pinnacle. Whichever pedal you can get your hands on, experiment with the amp gain and pedal gain/level approach as I've mentioned.
Oh, if your amp has a tube rectifier, maybe use that, too (not sure about Roadsters, Rectoverb doesn't have one) as I'm sure it reduces the attack or response of the amp.
Let us know how you go.