Scotland under-20s (sponsored by Martin Currie) have made just one change to the side that lost to Glasgow Warriors’ back-up side on Monday as they prepare for their final friendly before the 2009 6 Nations.Callum McConnachie (Hillhead/Jordanhill) has been drafted into the squad to face Edinburgh Rugby’s back-up squad at Lasswade (admission free, kick-off 2pm), in place of Kelso’s Grant Sheills after playing against his age-grade team-mates for the Warriors’ earlier in the week.PICTURED: Scrum-half Henry PyrgosScotland under-20s (sponsored by Martin Currie) have made just one change to the side that lost to Glasgow Warriors’ back-up side on Monday as they prepare for their final friendly before the 2009 6 Nations.Callum McConnachie (Hillhead/Jordanhill) has been drafted into the squad to face Edinburgh Rugby’s back-up squad at Lasswade (admission free, kick-off 2pm), in place of Kelso’s Grant Sheills after playing against his age-grade team-mates for the Warriors’ earlier in the week.The match is the second and final preparatory fixture for the squad since gathering together in camp over the Christmas period and Eamon John, Scotland under-20 head coach, believes it will offer the ideal test as they go into the 6 Nations January camp.John said: “I expect Edinburgh to try and move us about a bit in a typical Edinburgh style. We’ll be going in against a mature and experienced side and again the physical intensity that comes with that will provide another good test for the players.”We’re looking to take a step forward, taking the positives from the first half of the Glasgow game and try to play for a little longer as we move closer to the Welsh game.”Scotland under-20s 6 Nations Championship will begin at home against Wales on Friday 6 February.Scotland under-20s squad v Edinburgh RugbyForwardsDavid Morton (Bridgwater and Albion), Callum McConnachie (Hillhead/Jordanhill), Gavin Cameron (Stirling County), Douglas Orr (Haddington), Fraser Brown (Watsonians), Finlay Gillies (Heriot’s), Ryan McConnell (Peebles), Richie Gray (Glasgow Warriors), Nick Campbell (Glasgow Hawks), James Taylor (Loughborough University), Chris Fusaro (Heriot’s), Neil Rodger (Haddington), Tom Drennan (Edinburgh Academicals), Struan Dewar (Heriot’s)BacksPeter Jericevich (Glasgow Hawks), Henry Pyrgos (Wimbourne), Cameron Brown (Loughborough University), Andrew White (Glasgow Hawks), Robbie McGowan (Stirling County), Robbie Johnston (Leeds University and Leeds Carnegie), Paul Loudon (Durham University and Edinburgh Accies), Ashleigh McCulloch (Aberdeen Grammar), Grant Anderson (Ayr), Adam McKenzie (Darlington Mowden Park and Northumbria University), Peter Horne (West of Scotland)Monday 19 January – Scotland under-20 v Edinburgh back-up, Lasswade (kick-off 2pm) – admission is free